Recent content by John Tomlinson

why 10%-20% There are two possibilities I have in mind. When I make molds and then fill them with clay/ceramics the piece shrinks 10 to 20 percent. I would like to make a mold of the expanded piece so that when I make a ceramic object from it I can get something that was the original size. A...

Use of the material I would like to make a mold of an object, put the material into the mold, then do something to make the newly molded object expand to a size greater than the original while retaining the original shape.

Processes like thermal expansion produce very slight expansion/contraction. I am looking for a material/process that expands significantly, say 10% to 20%, in the room temperature range while maintaining its' shape. I know some materials expand significantly when wet, but don't know any numbers...