Food Safe vs Dinner Safe Pottery Glazes
Although the terms sound similar, “Food Safe” and “Dinner Safe” refer to different levels of suitability for functional ware. Understanding the distinction is important for potters who make mugs, plates, and bowls intended for everyday use.
Food Safe
A glaze is considered Food Safe when:
- It does not leach harmful materials (such as lead or excessive cadmium) into food or drink.
- It has been formulated to meet safety standards for direct food contact.
- It is stable at the recommended firing temperature so ingredients remain locked in the glaze matrix.
What “Food Safe” does not guarantee
Even if a glaze is labelled food safe, it may still have surface qualities that make it unsuitable for plates, bowls, or mugs, such as:
- Rough or matte surfaces that are difficult to clean
- Crackle/crazing, which can harbour bacteria
- Texture that absorbs food residue
- Decorative effects not intended for contact surfaces
So Food Safe means chemically safe, not “safe to eat from in all conditions”.
Dinner Safe
“Dinner Safe” (sometimes called Dinnerware Safe or Suitable for Food Surfaces) means the glaze is both:
- Food Safe (chemically stable and non-leaching)
- Functionally suitable for surfaces that will come in contact with food and utensils
- Smooth
- Non-porous
- Durable
- Easy to clean
- Resistant to staining and metal marking
In other words, Dinner Safe glazes are appropriate for plates, bowls, rims, and interiors of cups.
A glaze that is not dinner safe might still be Food safe for non-contact areas. Suitable for decorative ware, vases, sculptural pieces, or outsides of pots. A simple way to remember is:
Food Safe = chemically safe
Dinner Safe = chemically safe and functionally appropriate for eating/drinking surfaces
Examples
A glossy, fully vitrified cone 6 glaze ? often Dinner Safe
A matte, micro-crystalline glaze that’s technically food safe ? Food Safe, but may scratch or stain ? not dinner safe
Raku glazes or low-fire decorative glazes ? usually not food safe and not dinner safe
Food Safe means the glaze does not leach harmful materials. Dinner Safe means the surface is also smooth, durable, and suitable for everyday eating and drinking. Some glazes may be food safe chemically but not recommended for dinnerware surfaces due to texture, matte finish, or crazing.
