cardboard

Has anyone used a silicone liner in a cardboard frame or outer for their soap before? I have found a good source for excellent silicone liners but I want to keep costs down so I was thinking of fashioning some cardboard frames/supports until I can afford to make some wooden ones. Silly...

Has anyone used cardboard for a soap mold? I'm talking straight cardboard, no liner. I know it will absorb some oils... I'm thinking of using cardboard tubes for molds, and it's impossible to line their interiors will anything. I will wrap the outsides of the tubes with plastic wrap, for...