Do you have any storage tips for molds or clay? Keeping molds in order makes it much easier to select just the right one for each particular project. Select shadow boxes, drawers or trays that will hold one layer of molds. Place them by category in each storage unit and label the front in bold, easy to read letters. Here are some suggestions for storage units: pizza boxes, loaf cake pans, cookie sheets with sides, Rubbermaid type plastic trays or a metal tool chest or tackle box that has drawers. Some tool chests are stackable and it is also possible to find plastic trays that stock as your collections grows. Some people also like to attach a picture of the molded object to the back side of the mold. Feel free to use our pictures for this use "only." Never store cured clay with uncured clay. The plasticizers will leach back into the cured clay and cause it to weaken and possibly break. As long as raw clay is completely wrapped, it is safe to store in any type of container. Unwrapped clay won't dry out, but wrapping keeps airborne particles from sticking to the clay, which seems to act as a dust magnet. If you like, you can leave uncured clay on your work surface with just a sheet of plastic wrap draped over it to keep it clean. Wrapping raw clay makes it easier to store in a compact place without the different colors of clays touching. (This can lead to color transfer between blocks of clay.) Some people find that certain tackle boxes, in particular, don't react to clay, which makes it possible to store unwrapped clay or canes very easily. Glass or metal containers are fine for storing raw polymer clay. - Raw clay can be stored in anything that is not absorbent (paper, fabric, etc.), or next to any plastic that will not be dissolved by the plasticizer in raw clay. Waxed paper is generally okay, but it will allow some plasticizer to leach through it over time IF there is an absorbent surface underneath contacting it. Plastic recycling numbers # 1, # 2, # 4 and #5 to be okay. Avoid# 6 (polystyrene) like the plague for storing clay! You can test containers with a drop of mineral oil, to see if the container is usable for clay. Just let it sit for a few days. Polystyrene will start to get a roughened appearance pretty quickly. The melting and deforming takes at least a few hours or overnight though. Glass and metal are fine for storage. - Polymer clay should be stored in a cool, dry place. Clay begins curing at approximately 90 degrees and, once cured, clay will not return to its original state. - Storing clay: I have found that the best way to store this clay is in a Ziploc bag (one for each color) or wrapped in wax paper, because the polymers in the clay will react to certain plastics and actually melt them. It is best to wrap pieces before storing them in a larger container. Also, store them away from direct sunlight and heat sources, as this will cause the clay to cure or harden. I am still using some clays I bought over 4 years ago and it is quite usable and will last a long time if stored properly.