Things You Will Need
- Metal tray
- Prototype object
Artists, cooks and modelers use a variety of different materials to make molds for their projects. The nature of the project ultimately determines what kind of material is best to use.
If there are a lot of undercuts, for example, the crafter would use flexible, rubbery substances such as silicone or alginate. However, in a pinch you can make simple molds without special ordering these materials.
You can use cornstarch to create a temporary one-piece mold that is safe to use with craft and cooking projects.
- Set your oven to 250 degrees F. and wait for it to heat up completely.
- Select a metal tray big enough and deep enough for the mold you wish to make. Fill it with corn starch.
- Stick the tray in the oven for half an hour. This will dry the corn starch out completely. Remove the tray and let the cornstarch cool.
- Use a whisk to fluff the cornstarch. Do not let the cornstarch become packed. It should be light and fluffy.
- Run a ruler lightly over the bed of cornstarch to create a flat, level surface. Do not crush the cornstarch down, thereby packing it. Simply scrape it across the surface.
- Press the object you wish to duplicate into the cornstarch firmly and remove it. It should create an impression. The mold cannot sustain a tremendous amount of detail, but items such as buttons or medals work well for this. Your casting material must be a viscous liquid, be it liquid candy or plaster of Paris. If you use a non-food object, do not reuse the cornstarch with food.