Mayco Colors has put forward this statement regarding food safety and dinnerware safety of their fired products
We have heard a lot of conversation in the market about the differences between food safe and dinnerware safe glazes and wanted to make sure that you are prepared with information from Mayco that you can share.
“Food Safe” refers to the glaze in its final, fired state. “Food Safe” is a regulation and is defined by the Compliance Policy Guide, which is maintained by the FDA and only applies to lead and cadmium release. If a product has a food safe designation, we have conducted testing on the individual glaze (or similar in formulation), which has passed standards for food safety when used according to manufacturer’s direction.
“Dinnerware Safe” indicates the fired glaze surface meets the FDA standards for food safe, the fired surface is free of surface texture that could potentially trap bacteria, and the fired surface is chemically durable. Please note, dinnerware safety is not defined by cutlery scratches. Some glazes, regardless of surface texture or porosity of underlying clay body, will be designated as not suitable for dinnerware as the fired glaze surface is not durable and can be impacted by contact with some food or liquids. While it may not be harmful, it is certainly not desirable. An example would be Stoneware Texture glazes or Cobblestones.
These two designations are separate from AP, CL and Non-Toxic Seals which are featured on most of our liquid glaze labels and only relate to the glaze in its wet, unfired form.
The following link is an excellent 6-minute YouTube video that covers all of what is said here and more. https://www.maycocolors.com/resources/dinnerware-food-safety/
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