Food safe varnish for air dry clay. This question has been well and truly answered but it raised a memory from my childhood that in some sense changed my future. Sponge paint the varnish on it in light strokes. Tips for using your food safe platter. My friend fran an air dry clay master from fall for diy suggests doing three light coats of the food safe varnish.
With regular clay as long as you work with food safe glaze you and your students can create things like functional mugs bowls and plates safe to use for eating and drinking. This varnish makes the platter food safe however it is not. Students can still create mugs bowls and plates with air dry clay but they must be for decorative purposes only. It may interest you to know that the matter of whether polymer clay is food safe is also a matter of much debate.
Earthen clay is anothe. Air dry clay is intended for decorative purposes or dry holding like dry flowers or jewelry bins. There is no reason to make it food safe because putting anything wet into air dry clay will make it soft and if you put a coating on it if there is the slightest crack the coating will lift off. Youve proably read the caution on a box of sculpey or other polymer clay.