HattieS Patties
These ring-sizing inserts are used to ensure accurate sizes for Metal Clay rings. The kit comes with instructions and three HattieS Ring Forming Strips.
HattieS® Patties™ are an excellent way to control the shrinkage of PMC3 rings during firing. Just make the ring 2 sizes larger than the desired finished size and fire! It is the easy and smart way to make metal clay rings.
Follow instructions carefully, Inserts contain silica which should not be breathed!
Here is a video describing use : https://www.youtube.com/watch?v=w2M_aW6hd1c