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PART I: CURRENT STATE OF SAFETY IN THE JEWELRY PRODUCTION INDUSTRY
I. General Situation
The Ministry of Labour, Invalids and Social Affairs informs sectors and localities of the occupational accident situation in the first 6 months of 2024 and outlines key solutions to proactively prevent incidents and accidents in the last 6 months of 2024. According to reports from 61 out of 63 centrally governed provinces and cities, in the first 6 months of 2024, there were a total of 3,201 occupational accidents nationwide (a decrease of 227 cases, equivalent to 7.09% compared to the same period in 2023), resulting in 3,065 victims (a decrease of 197 people, equivalent to 6.04% compared to the first 6 months of 2023), including both employees under labor contracts and those working without labor contracts. Specifically:- Number of fatal occupational accidents: 320 cases, a decrease of 25 cases (7.25%) compared to the first 6 months of 2023 (including 245 cases in areas with labor relations, a decrease of 28 cases or 10.3%; and 75 cases in areas without labor contracts, an increase of 3 cases or 4.2% compared to the first 6 months of 2023);
- Number of deaths due to occupational accidents: 346 people, a decrease of 7 people or 1.98% compared to the same period in 2023 (including 268 in areas with labor relations, a decrease of 13 people or 4.63%; and 78 in areas without labor contracts, an increase of 6 people or 8.33%).
- Number of people seriously injured: 810 people, an increase of 26 people or 3.32% compared to the first 6 months of 2023 (including 710 in areas with labor relations, a decrease of 5 people or 0.7%; and 100 in areas without labor contracts, an increase of 31 people or 44.92%).
The occupational accident situation in the first 6 months of 2024 in both sectors with and without labor relations saw a decrease in the number of deaths and fatal accidents compared to the same period in 2023.
II. Some Occupational Accidents in Jewelry Production Plants
In the jewelry manufacturing industry, ensuring occupational safety is a top priority. However, like any other field, there are also notable occupational accidents. Below are some unfortunate incidents that have occurred in jewelry production plants:
- Accidents Related to Machinery and Equipment: Some accidents occur due to technical failures on machinery during the production process. This can include sudden technical failures, lack of regular maintenance, or incidents during operation.
- Accidents Due to Human Factors: Some accidents are caused by human factors, such as the inexperience of workers, non-compliance with occupational safety rules, or a lack of adequate training on safety and equipment use.
- Causes from Raw Materials and Chemicals: Jewelry production plants often use special raw materials and chemicals. Accidents can arise from improper handling, unsafe storage, or incidents during the combination of components.
- Lack of a Quality Control System: Jewelry production plants need a strong quality control system to ensure the final product meets safety standards. Accidents can arise if there are loopholes in the quality control process.
- Proposed Measures to Prevent Accidents: To minimize the risk of occupational accidents, jewelry production plants should focus on improving equipment maintenance systems, training employees in occupational safety, and maintaining strict quality control measures.
These measures can help the jewelry manufacturing industry not only ensure employee safety but also enhance the reputation and quality of the final product.
PART II: OCCUPATIONAL SAFETY AND HEALTH IN JEWELRY PRODUCTION
I. Occupational safety and health for employees creating gold or silver casting molds in preparation for jewelry production
1. Job Characteristics of Creating Gold or Silver Casting Molds for Jewelry Production
In the process of creating gold or silver casting molds in preparation for jewelry production, there are several important job characteristics to consider. First and foremost, the choice of material for the mold plays a crucial role in ensuring the high quality of the final product. Typically, molds are made from metals like stainless steel, which can withstand high temperatures and pressures.
The mold-making process begins with creating an accurate model of the jewelry piece. Advanced technologies such as CNC or 3D printing are used to ensure maximum precision and detail in the mold-making process. For gold jewelry, the process may require in-depth knowledge of the special properties of gold, as well as traditional crafting techniques.
Creating casting molds also requires special attention to the detail and surface of the mold. Artisans often have to use precise tools to create intricate details on the mold, ensuring that the final product will have a high finish and significant quality. This process often involves multiple stages of testing and adjustment to ensure the accuracy and durability of the mold.
2. Types of Accidents During the Process of Creating Gold or Silver Casting Molds for Jewelry Production
During the process of creating gold or silver casting molds for jewelry production, accidents can occur, posing significant challenges. Some common types of accidents include the loss of precious materials like gold or silver due to an inefficient casting process, leading to waste and increased costs.
Other accidents that frequently occur in the mold-making process are related to occupational safety. Artisans must ensure they use full personal protective equipment to avoid explosions or toxic substances from the materials. At the same time, controlling the temperature and pressure during the casting process is also a crucial factor in preventing unwanted incidents.
In addition, technical errors in mold making can also lead to the final product not meeting expected quality. Maintaining the correct size, shape, and detail of the mold plays a large role in promoting product quality.
3. Causes of Accidents When Creating Gold or Silver Casting Molds for Jewelry Production
There are many causes of accidents during the process of creating gold or silver casting molds for jewelry production. One of the main causes is a lack of understanding or non-compliance with occupational safety procedures. When employees do not have a clear understanding of how to use safety equipment or do not adhere to safety rules correctly, the risk of accidents increases significantly.
Another cause related to the mold-making process can be a lack of attention to technical details. If the mold model is not designed or produced correctly, it can lead to errors in the casting process, causing loss of precious materials and reducing product quality.
Furthermore, technical causes such as uneven temperature and pressure control can also contribute to unwanted incidents. Unstable temperature and pressure fluctuations can create non-uniform casting results and reduce the accuracy of the product.
4. Accident Prevention Measures When Creating Gold or Silver Casting Molds for Jewelry Production
To ensure occupational safety during the process of creating gold or silver casting molds for jewelry, implementing accident prevention measures is extremely important. First and foremost is conducting periodic occupational safety training for all employees. This training should include the proper use of personal protective equipment, safe work procedures, and how to handle emergencies.
At the same time, establishing and maintaining a safety procedure is an important measure. Ensure that all work equipment is properly maintained to avoid breakdowns that cause accidents. Work procedures need to be clearly established and understood by employees, especially regulations on pressure, temperature, and material use.
In addition, maintaining a clean and tidy work environment is also an accident prevention measure. Ensure that there are no excess materials or unsafe work tools scattered in the work area.
5. Occupational Safety Regulations When Creating Gold or Silver Casting Molds for Jewelry Production
Occupational safety regulations play a crucial role in the process of creating gold or silver casting molds for jewelry production. First, all employees involved in the creation process must be fully trained on the use of personal protective equipment, including helmets, gloves, and safety glasses.
The regulations also need to detail how to use and maintain work machinery and equipment. Ensure that everyone has a clear understanding of maintaining safety during machine operation, controlling temperature and casting pressure to avoid unwanted accidents.
In addition, the regulations also need to specifically describe the process of handling precious materials like gold and silver, from storage to use and disposal. This may include special measures to prevent the risk of fire, explosion, and toxins.
Finally, the regulations need to provide detailed information on emergency and first aid measures, so that everyone can respond effectively in the event of an incident. This includes how to use various types of first aid kits and how to make an emergency call.
6. Handling Emergency Accidents When Creating Gold or Silver Casting Molds for Jewelry Production
Handling an emergency accident is a crucial part of the safety procedure when creating gold or silver casting molds for jewelry. In the event of an incident, employees must immediately take the first steps to ensure their own safety and that of their colleagues.
First and foremost, reporting immediately to management and the first aid team is the top priority. Accurate information about the type of accident and the condition of the victim will help prepare for the best possible first aid.
It is also important to use first aid and personal support equipment correctly. Everyone should be trained to use first aid kits, first aid boxes, and safety tools effectively, helping to minimize injuries and maintain a safe situation.
II. Occupational safety and health for employees bending cast gold or silver blanks for jewelry making
1. Job Characteristics of Bending Cast Gold or Silver Blanks for Jewelry Making
In the jewelry making industry, the process of bending cast gold or silver blanks plays an important role in creating exquisite and unique products. This requires professionalism and high technical skill from the artisan.
The characteristics of this work include selecting high-quality blanks, usually 18k gold or sterling silver, to ensure aesthetic properties and retain value. The bending process is performed with precise tools and in-depth technical skills, creating soft and accurate curves on the product.
In addition, adjusting the temperature and pressure during the bending process is also an important part. This helps the artisan create complex shapes while still retaining the durability and elasticity of the metal.
2. Types of Accidents During the Process of Bending Cast Gold or Silver Blanks for Jewelry Making
During the process of bending cast gold or silver blanks for jewelry making, there are risks and accidents that goldsmiths must face. Although this is a professional job, there are still significant challenges.
Some common accidents are the metal blank cracking or deforming due to poorly controlled pressure and temperature. This places high demands on the skill and experience of the artisan to avoid this situation.
In addition, there is a risk of losing precious metal if the bending process is not performed carefully. This loss not only causes a waste of raw materials but also reduces the quality and value of the product.
3. Causes of Accidents When Bending Cast Gold or Silver Blanks for Jewelry Making
The causes of accidents during the process of bending gold or silver blanks in jewelry making can stem from many different factors. One of the main causes is a lack of precision in controlling pressure and temperature. When the correct balance is not ensured, the metal can become too soft or too brittle, leading to cracks, deformation, or loss.
The inexperience of the artisan can also be a significant factor. Bending blanks requires skill and a solid understanding of the properties of each type of metal. The artisan needs to have a clear understanding of the heat resistance, elasticity, and how to handle each type of blank.
Some other causes include a lack of thorough preparation, selecting substandard blanks, or negligence in the use of tools. To avoid accidents, the artisan needs to follow a thorough work process, use safety equipment, and accumulate experience to master every aspect of the art of bending precious metals.
4. Accident Prevention Measures When Bending Cast Gold or Silver Blanks for Jewelry Making
To ensure safety and avoid accidents when bending gold or silver blanks during the jewelry making process, applying preventive measures is crucial. First and foremost, occupational environment monitoring plays an important role in ensuring that working conditions are safe and meet occupational safety standards.
The artisan needs to be fully trained on the use of safety equipment and have a clear understanding of the risks that can arise during work. Wearing personal protective equipment such as helmets, heat-resistant gloves, and safety glasses helps to minimize the risk of injury.
Controlling temperature and pressure is also important. Use measuring and control devices for the working environment to ensure that the bending process takes place under ideal conditions. At the same time, regularly inspect and maintain equipment to ensure stable and safe operation.
5. Occupational Safety Regulations When Bending Cast Gold or Silver Blanks for Jewelry Making
Occupational safety regulations in the bending of gold or silver blanks for jewelry making play an important role in protecting the health and safety of the jewelry artist. According to these regulations, the use of personal protective equipment is mandatory, including helmets, safety glasses, and heat-resistant gloves, to reduce the risk of injury and protect the skin from the effects of high temperatures.
In addition, the regulations also require the artist to control the temperature and pressure of the working environment. This not only helps to ensure the bending process is carried out safely but also helps to protect the quality of the metal and avoid unwanted losses.
In particular, the safety regulations also include training and guiding the artisan on work techniques and equipment use. This ensures that they have a full understanding to face the challenges and risks that may arise during the jewelry making process.
6. Handling Emergency Accidents When Bending Cast Gold or Silver Blanks for Jewelry Making
Handling an emergency accident when bending gold or silver blanks during the jewelry making process requires quick thinking and thorough preparation. In the case of a machine explosion or fire, the artisan must immediately stop and turn off the power, then use a fire extinguisher to control the situation.
If there is a personal injury, the artist needs to call for emergency medical assistance immediately and perform first aid measures. This includes stopping the bleeding, protecting the wound, and keeping the injured person in a comfortable position until professional help arrives.
In all cases, reporting the accident to the manager and colleagues is important to get support and help from the beginning. At the same time, reviewing the work process and re-checking the safety measures is also an important step to prevent the incident from recurring in the future.
III. Occupational safety and health for employees crafting and grinding on gold or silver blanks for jewelry processing
1. Job Characteristics of Crafting and Grinding on Gold or Silver Blanks for Jewelry Processing
In the jewelry making industry, the process of crafting and grinding on gold or silver blanks requires high precision and technique. Artisans must carefully adjust every line to create a final product that is beautiful and of high quality.
The process begins by selecting high-quality gold or silver blanks, then adjusting the shape and size based on the predetermined design. The use of professional tools such as drills and grinders helps the artisan create small details with high precision.
Most important is the grinding technique, where experts use grinding wheels and stones to create a smooth and shiny surface. This requires concentration and high skill to avoid damaging the details and to maintain uniformity.
2. Types of Accidents During the Process of Crafting and Grinding on Gold or Silver Blanks for Jewelry Processing
During the process of crafting and grinding jewelry from gold or silver, artisans often face many potential risks and accidents. One of the common problems is the risk of injury from using cutting and grinding tools. Handling small and complex details sometimes leads to cutting or scratching fingers.
In addition, working with grinding machines can create fine metal dust and grinding particles, posing a risk of illness to the worker when inhaled. To minimize this risk, the use of personal protective equipment such as masks and gloves is important.
Accidents related to the use of chemicals are another problem. The chemicals used in the jewelry processing process can cause skin irritation and if not enough protection is worn, the artisan may face serious health problems.
3. Causes of Accidents When Crafting and Grinding on Gold or Silver Blanks for Jewelry Processing
The causes of accidents during the process of crafting and grinding jewelry from gold or silver often stem from many factors. One of the main causes is the inattention and inexperience of the artisan. Working with professional tools requires high concentration, and any lapse in attention can lead to an accident.
The tools used in the crafting process, such as drills and grinders, can become another cause of accidents if they are not properly maintained. Malfunctioning machinery can create dangerous situations and lead to injuries.
A lack of understanding of the properties of the materials is also a significant cause. If the artisan does not have a clear understanding of the properties of gold or silver, using the wrong tools and techniques can damage the product or cause a serious accident.
4. Accident Prevention Measures When Crafting and Grinding on Gold or Silver Blanks for Jewelry Processing
To ensure safety when crafting and grinding jewelry from gold or silver, implementing preventive measures is crucial. First, the artisan needs to ensure that they are using tools and machinery that are in good working condition and are regularly maintained. Regular checks help to detect and fix problems before they cause an accident.
Using personal protective equipment is an effective measure to reduce the risk of injury. Wearing a mask, gloves, and safety glasses helps to protect the worker from metal dust and chemicals that can cause skin irritation. At the same time, the artisan should also ensure that no unsafe jewelry or personal items are worn while working.
Limiting inattention is another important measure. High concentration on the job and avoiding distracting factors can reduce the risk of an accident occurring. Finally, safety training and guidance are key to raising the awareness and safety skills of employees during the work process.
5. Occupational Safety Regulations When Crafting and Grinding on Gold or Silver Blanks for Jewelry Processing
Occupational safety regulations are an extremely important factor in the process of crafting and grinding jewelry from gold or silver. Jewelry factories and production facilities often have to adhere to specific principles to ensure the safety of their employees. First, ensuring that all tools and machinery are regularly inspected and properly maintained is a basic regulation.
Personal protective equipment also plays an important role, and accordingly, everyone working in the jewelry industry must wear a mask, gloves, and safety glasses. This regulation aims to protect them from metal dust and chemicals that can be harmful to their health.
Furthermore, occupational safety regulations often require providing full information and safety training for employees. This helps them to recognize and respond to risks that may arise during the work process, and at the same time, raises their awareness of occupational safety. Adherence to these regulations not only helps to protect the health of the workers but also ensures the quality and safety of the final jewelry product.
6. Handling Emergency Accidents When Crafting and Grinding on Gold or Silver Blanks for Jewelry Processing
Handling an emergency accident is a crucial aspect of occupational safety in the industry of crafting and grinding jewelry from gold or silver. In the event of an accident, immediately activating the alarm system and calling the first aid team is the top priority. Employees need to know how to use emergency communication devices and report the situation in detail.
In addition, providing first aid on the spot is important to minimize injuries. Employees need to be trained to use the first aid kit and know how to handle specific situations such as bleeding, injuries, or suffocation. At the same time, keeping the work area safe and ensuring that everyone around is not at risk of further accidents is important.
IV. Occupational safety and health for employees setting gemstones or assembling parts of jewelry into a complete piece
1. Job Characteristics of Setting Gemstones or Assembling Jewelry Parts into a Complete Piece
In the art of jewelry making, the job of setting gemstones or assembling parts of jewelry into a complete piece plays an important role in the production process. Jewelry artisans are not only talented technicians but also artists with a creative vision and skill.
Setting gemstones requires meticulousness and precision. The gemstones are not only prominent highlights but also the center of light attraction, creating sparkle and luxury for the jewelry. In addition, assembling the parts of the jewelry into a complete piece requires skill in combining small details into a unified work.
Artisans often have to perform many steps such as polishing, detail processing, and connecting the components harmoniously. The subtlety in adjusting each detail not only creates the beauty of the product but also reflects the diligence and passion of the artisan for the art of jewelry making.
2. Types of Accidents During the Process of Setting Gemstones or Assembling Jewelry Parts into a Complete Piece
During the process of setting gemstones or assembling parts of jewelry, artisans often face many risks and types of accidents that can affect the quality and finish of the product. Some common problems include losing gemstones due to impact, chipping, or loss during handling.
Accidents frequently occur during the gemstone polishing process, where uneven pressure can cause the desired gemstone to crack or break. Furthermore, during the process of assembling the parts of the jewelry, the use of incorrect tools and techniques can lead to the loss or deformation of details.
Faced with these risks, artisans must apply careful techniques and use appropriate tools. At the same time, applying quality control and a regular inspection process helps to minimize the risk of accidents and ensure that the jewelry product is created with high quality and long-lasting durability.
3. Causes of Accidents When Setting Gemstones or Assembling Jewelry Parts into a Complete Piece
The causes of accidents during the process of setting gemstones or assembling parts of jewelry can stem from many different factors. One of the main causes is the lack of experience and crafting skills of the artisan. If the person performing the work does not have a sufficient understanding of both the process and the materials used, they may make technical errors, leading to accidents such as breaking gemstones or deforming jewelry details.
Another factor is the use of incorrect or imprecise tools. Uneven pressure, excessive force, or using tools that are not suitable for different types of gemstones or materials can cause serious damage to the product.
Lack of quality control during the production process is also a significant factor. If there is no regular inspection process or no close supervision from the manager, small errors can become serious and lead to unfortunate accidents.
4. Accident Prevention Measures When Setting Gemstones or Assembling Jewelry Parts into a Complete Piece
To prevent accidents during the process of setting gemstones or assembling parts of jewelry, implementing preventive measures is extremely important. First and foremost, ensuring that the artisan has sufficient skills and a solid understanding of both the process and the materials is the most important step. Full and continuous training helps them to master the necessary techniques and to feel the impact of each action on the product.
Using tools and equipment correctly is another particularly important factor. The artisan must choose the appropriate tools for the type of gemstone and material, and at the same time, apply pressure and force with consideration to avoid causing unwanted damage.
The quality control process also plays an important role in preventing accidents. Establishing regular inspection steps and close supervision from the manager helps to detect and fix errors as soon as they appear, avoiding bigger problems in the production process.
5. Occupational Safety Regulations When Setting Gemstones or Assembling Jewelry Parts into a Complete Piece
To ensure occupational safety during the process of setting gemstones or assembling parts of jewelry, adherence to safety regulations is a top concern. Artisans must be trained on safety measures and the use of personal protective equipment, including safety glasses, gloves, and masks, to protect against risks such as dust and chemicals.
Specific regulations on the storage and use of materials are also an important factor. Artisans must know how to handle gemstone materials and other materials safely to avoid health risks.
Implementing risk control measures such as cleaning the work area and regularly inspecting work equipment helps to ensure a safe work environment. In addition, educating employees about the risks that can occur during the production process and how to respond to them also plays an important role in maintaining occupational safety.
6. Handling Emergency Accidents When Setting Gemstones or Assembling Jewelry Parts into a Complete Piece
Handling an emergency accident during the process of setting gemstones or assembling parts of jewelry requires quick thinking and proactiveness from the artisan. In the event of a broken gemstone or damaged detail, stopping work immediately is important to prevent the situation from getting worse.
First, the artisan must ensure their personal safety by wearing full protective equipment and leaving the high-risk area. Then, they should immediately inform their manager or a nearby colleague about the situation to receive support.
In the case that a material or tool causes a problem, turning off the power or providing first aid is the top priority. The artisan must know how to use the safety system and at the same time call a professional if necessary.
V. Occupational safety and health for employees polishing finished jewelry
1. Job Characteristics of Polishing Finished Jewelry
The job of polishing finished jewelry is a delicate process that requires high professionalism to create a final product that achieves the desired quality and sparkle. This process usually involves using precise tools and techniques to achieve optimal results.
One of the important characteristics of polishing work is attention to detail. Artisans often have to work with small details on the surface of the jewelry, and polishing is done to remove any dirt, small cracks, or impurities that can reduce the aesthetic value of the product.
In addition, the correct selection and use of polishing materials is also important. Materials such as polishing compound, lubricant, and polishing ink must be carefully selected to ensure that they not only provide good performance but also protect the surface of the jewelry.
For special types of jewelry such as gold, silver, and diamonds, polishing also requires expertise in the type of metal and gemstone. The techniques must be adjusted accordingly to ensure that they do not damage or lose their natural beauty.
2. Types of Accidents During the Process of Polishing Finished Jewelry
During the process of polishing finished jewelry, types of accidents can occur and require great care from the artisan. One of the common risks is the loss of precious raw materials due to a lack of control during the polishing process. The improper use of machinery or excessive force can lead to unwanted wear of the metal or a reduction in the quality of the gemstone.
Other accidents can occur when the artisan does not ensure safety during work. Injuries from cutting tools or machinery can occur if full protection is not used. At the same time, the use of polishing compounds with strong chemicals also poses a risk of harm to health if safety rules are not followed.
In addition, accidents due to digital technical equipment are also a major concern. The use of microprocessor-controlled machinery can lead to technical errors or the loss of important data, affecting the production process.
3. Causes of Accidents When Polishing Finished Jewelry
The causes of accidents during the jewelry polishing process are diverse and require awareness and careful technical management. One of the main factors is the lack of experience and skills of the artisan. The jewelry artist needs to have a clear understanding of how to use the correct tools and polishing techniques to avoid unwanted situations.
Unsafe equipment and machinery are also a significant cause. The use of outdated equipment that is not properly maintained can lead to unwanted incidents, from machinery breakdowns to a loss of control during the polishing process.
The materials used also play a large role in causing accidents. Inaccuracy in selecting the type of polishing compound can lead to unwanted wear of the metal or affect the durability of the gemstone.
4. Accident Prevention Measures When Polishing Finished Jewelry
To prevent accidents when polishing finished jewelry, it is necessary to establish systematic and regular safety measures. First, ensuring that the artisan is technically trained is important. A solid understanding of how to use the correct tools, polishing techniques, and safety measures will reduce the risk of accidents.
Management should regularly inspect and maintain the polishing equipment to ensure it is working correctly and safely. It is necessary to establish a regular maintenance plan to prevent unwanted incidents.
In addition, the use of protective equipment is an indispensable factor. The artisan needs to be fully equipped with personal protective equipment such as gloves, safety glasses, and safety clothing to protect against injuries and the effects of polishing compounds.
In particular, creating a safe and comfortable working environment is also important. Minimizing factors that cause fatigue and increasing concentration can reduce the risk of accidents occurring.
5. Occupational Safety Regulations When Polishing Finished Jewelry
Occupational safety regulations when polishing finished jewelry play an important role in protecting health and ensuring a safe working environment for artisans. According to safety guidelines, artisans must be fully trained on how to use tools and equipment, as well as safe polishing techniques.
The regulations also recommend conducting risk assessments and planning for labor protection. This includes identifying and minimizing risks from polishing jobs, as well as ensuring that artisans have adequate personal protection such as safety glasses and gloves.
Management also needs to ensure that all equipment is properly and regularly maintained. They need to monitor and implement safety measures to reduce the risk of accidents and protect the health of employees.
6. Handling Emergency Accidents When Polishing Finished Jewelry
Handling an emergency accident when polishing jewelry requires quick thinking and decisiveness from both employees and management. In the event of an accident, the first step is to immediately stop all polishing work and ensure personal safety. Ensure that everyone around has been informed of the dangerous situation.
Immediately after, management or the person in charge of safety must activate the warning system and call for emergency services if necessary. If the accident involves an injury, first aid must be provided immediately and the injured person should be kept calm until the emergency team arrives.
While waiting for the emergency team, it is important to record the details of the accident, including the cause, time, and a description of the situation. This not only supports the subsequent investigation process but also helps to improve the occupational safety process.
PART III: Further Reference
1. Group 3 Occupational Safety Test
2. Quotation for Occupational Safety Training Services
3. Download Documents
- DOWNLOAD OCCUPATIONAL SAFETY TRAINING MATERIALS FOR JEWELRY PRODUCTION
- Slides for occupational safety training lecture on jewelry production
- Multiple choice test for occupational safety in jewelry production