Check out info on resin casting. You have a mold, mix the resin with a catalyst. Whatever is in the mold gets embedded in plastic. - This link doesn't include info, but it's a reminder to go check out more info on resin casting
FurnityurMolds: tutorial about work with dandelions and epoxy resin. You'll learn how to use flowers, molds and epoxy resin to create different kinds of jewellery. I want a dandelion necklace for my Dandie dog.