Ceramics Safety Policies
- Hazard of use and Means of Disposal
- Personal hygiene
- Personal protection
Protection against kiln hazards
Protection against dust exposure
- Kiln safety
- Food-safe (dinnerware-safe) glazes
- Aerosol sprays, solvents & overglazes
- Quartz-containing materials
- Spraying glazes
- Common Sense Safety Rules
These safety guidelines are meant for use by students and staff who create, or recreate, in a limited number, largely by hand, works that may or may not have a practical use, but in which aesthetic considerations are paramount. These guidelines are meant for use in the Ceramic Studios, and as a supplement to other safety information, such as material safety data sheets or Occupational Safety and Health Administration (OSHA), EPA and DEC guidelines and regulations and hazard communication programs. While these guidelines are comprehensive, these guidelines may not cover every safety concern found in the Ceramic Studios and may be amended as needed.
- The term ceramics refers to the molding of clay and decoration of bisque ware using under glazes, glazes or acrylic paint.
- Teachers Assistants are Graduate Students hired by the Art Department to Teach Ceramics courses, operate the kilns, mix glazes and make clay.
- Professors are instructors hired by the college to teach Ceramics.
- The Ceramic Studio includes: Richards Hall Rooms 117 and 118, The Electric kiln room, the glaze mixing room, the clay mixing room, the clay storage area and the outdoor kiln pad.
The Material Safety Data Sheets are located in a binder in the Glaze Mixing Room. Know the characteristics of each pigment you plan to work with. Each container list the primary element used to produce a particular pigment. Some pigments are more hazardous than others. In ceramics, as in all areas of human activity, proper usage of products ensures safety. Misuse of products may expose the ceramist to potentially harmful substances. Care should be taken to read all label instructions before using a product. The MSDS book will identify any hazardous ingredients and their hazards, provide first aid instructions and give recommendations on how to use safely and prevent excessive exposure. Other resources for finding the MSDS for materials used in the Ceramics Studio is:
In case of Emergency Contact University Police
>300 N 17th St, Lincoln, NE 68588
Common sense cleanup and maintenance of the work area is a must for people working with ceramics. It is strongly recommended that the following rules be observed.
- Clean container rims before closing to eliminate buildup of dried product.
- Dust Control - Dust control measures are necessary for any operation which may generate dust. This includes the creation of dust from dipping glazes which have dried on work surfaces, mixing of dry ceramic materials, grinding, drilling or sanding greenware, bisqueware or working with clay to make pottery.
- Keep working surfaces and shelves clean by wiping down with a wet sponge, rinsing the sponge frequently.
- Clean up spills when they occur. Do not allow to dry. Wet-mop floors to control dust; do not sweep.
- Any use of Vacuuming equipment should be left to the custodial staff. The vacuum used should be equipped with HEPA-type exhausting filter that traps particles 0.3 micron in diameter or larger.
- Work over our sealed floor. All work surfaces should be non- porous. These measures allow easy cleanup of spills and dust and prevent tracking.
- In order to decrease dust production, clean greenware when damp. Alternately, use a down draft ventilated cleaning table, exhausting dust out of doors.
- Work on newspaper or a paper towel for easy cleanup and disposal.
Ceramic products and materials can be handled very safely if we keep in mind that materials should not be ingested or dust inhaled. Do no smoke, eat or drink when working with potentially hazardous ceramic materials. Such practices can transfer hazardous substance to the mouth or leave substances such as salt and oil on the work surfaces and thus ruin your glazes.
- Always wash hands thoroughly when you are through working with hazardous materials, even after removing gloves. Do not use any utensils that will later be used in the kitchen. If there is an accidental ingestion, call the University Police.
- Do not handle materials used to produce ceramics when you have open cuts or wounds.
Never work in the Studio without knowing how to properly protect yourself from hazards. Always work in the Studio with someone else present, or with permission from the instructor to be in the studio. If the Professor is not present, make sure someone knows you are working in the Studio. Do not let unauthorized persons into the Studio.
Remove jewelry and use vinyl or lined rubber work gloves when glaze dipping. Do not go near the Kilns.
- Protection Against Kiln Hazards.
- Students should not go near the Kilns. Assistants and Professors must wear Insulating gloves when handling a kiln after the venting period as the handle will be hot. Never touch the outside of a kiln (other than the control panel) when it is turned on as the kiln surface temperature may be very hot.
- Dark-shaded glasses from a safety supply house (shade number 1.7-3.0) are recommended when looking into kiln peepholes to protect your eyes from radiant heat. Normal sunglasses are inadequate for this purpose. Protective glasses also allow you to see witness cones more clearly.
- Protection Against Dust Exposure
- Do not wear contact lenses when working in dusty environments. Dust particles may become trapped between the lens and the surface of the eye, and these small particles can scratch the eye.
- Use the spray booth when spraying water-based glazes and solvent based materials.
- For work with hazardous particulates, use a NIOSH approved respirator for fumes.
- Maintain the spray booth according to the manufacturers directions.
- The only persons authorized to operate the kilns are Assistants and Professors and students who have been properly trained to use the kiln by the instructor, and have permission.
- Do not leave papers or combustibles around the kiln, or place objects on the kiln while firing. Always unplug the kiln while making any repairs.
- Do not try to unload the kiln until the outside of the kiln is cool to the touch and the pieces can be easily touched by hand or with gloves. Removing hot pieces presents risks of burns or fires or crazing of glazed surfaces.
- When unloading a kiln, be careful of the stilt marks on glazed ceramic pieces. They can be sharp and should be smoothed as soon as possible with a grinding wheel or stone. Wear safety glasses while grinding off stilt marks.
Many glazes are formulated to be safely used on surfaces that come in contact with food or drink.
- If surfaces will come into contact with food or drink, use only glazes that are specifically for food or dinnerware.
- Do not mix lead-containing food-safe glazes, as the balance of ingredients in each glaze will be disrupted. Each mixture would have to be re-tested by an approved laboratory to determine if the mixture is also food safe. Non-lead containing food or dinnerware safe glazes can be mixed.
- Proper firing of food-safe glazes is critical. Use pyrometers or pyrometric shelf cones on the kiln shelves to ensure that the pieces are fired hot enough, even if the kiln is electronically controlled or has an automatic kiln sitter. If glazed surfaces are crazed, blistered, under fired, or otherwise defective, glazes may not be food safe.
These products are easy to use safely and will present no problems as long as these three important rules are observed: keep out of reach of children, use in a well-ventilated area, and clean up after use. Prior to using spray aerosols, solvents or overglazes, read the warning labels and safe use instructions on the containers. Over exposure to solvent-containing ceramic materials can result in symptoms of eye or nose irritation, headaches, dizziness, nausea and confusion.
- Containers should be kept tightly closed when not in use.
- Aerosol sprays, solvents and solvent-based overglazes should be used out of doors, in a locally exhausting hood or spray booth or with a window exhaust fan to assure adequate cross ventilation.
- Flammable Materials - If solvents, spray aerosols or solvent-based overglazes are flammable, don not use them near a heat source or open flame, or close to the kiln. Rags and paper towels or tissues used with these products should be placed in a metal container designed for disposal of flammable materials. Alternately contaminated materials can be washed or placed under water until final disposal.
As with any finely ground substance, dust control is the primary safety factor to be remembered by those who customarily mix powdered slips, clays or ceramic glazes. Slips, clays, and some ceramic glazes contain quartz. Dust exposures also occur when cutting, sanding, grinding or drilling ceramic materials.
- Excessive inhalation of quartz dust can result in chronic lung damage. Quartz dust, when it is in a respirable (breathable) form, is considered a human cancer agent.
- When activities potentially generate ceramic dust, use a NIOSH-approved mask
- for fumes and mix the materials under a locally exhausting hood.
When spraying glazes, use extreme caution and follow these safety instructions. Glazes may contain quartz or metallic oxides whose toxic potential increases if inhaled.
- Use a spray booth equipped with a strong fan that exhausts all glaze mists outside of the work area.
- Use a NIOSH-approved mask appropriate for the type of glaze being sprayed.
- Wear protective clothing including hair covering that is removed before eating, drinking, smoking or leaving work. Wash hands thoroughly immediately after spraying and removing protective clothes. Do not smoke or eat in the work area.
Keep these common-sense safety rules in mind and remember to observe them.
When working in the Studio:
- Keep work surfaces and shelves clean by wiping down with a wet sponge.
- Clean up spills when they occur. Do not allow to dry.
- Try to work on a newspaper or paper towel for easy cleanup and disposal.
- Do not eat or drink when working with ceramic materials.
- Wash your hands thoroughly when you are through working.
- Use a smock when working with ceramic materials or wash clothes after.
When using solvent-containing ceramic materials:
- Work in a locally exhausting hood or with an exhaust fan.
- Do not use or store near kilns, other heat sources or an open flame.
- Dispose of used rags in an air-tight metal container or under water.
When spray applying glazes:
- Work in a spray booth.
- Use a NIOSH-approved respirator for mists.
Try not to track dust from the studio to other areas of the building.