Plaster Mold

Today I went up to the shop and asked Marty if I could use some plaster to make a mold.  I took the innersole from the snow boarding boot Mike gave me as the basic form for my inner sole... it could have been any inner-sole at this point so this one was fine.

I was trying to make this on a tight budget so all of my material was found.  I used some 8th inch plex to build a box for the mold.  If I were doing this like a pro I would have used a stronger material like wood, thicker plex, or both wood and plex.

In any case the 8th" bowed a little but worked ok.

So I poured the plaster into the box, then pushed the inner sole into the plaster before it stiffened up too much.  Then, once the lower half of the mold was hardened, I added a coat of oil to top of the mold, leaving the inner sole in the mold, and poured  the top half of the mold.

At this point I was running out of plaster and out of time in the shops so the top of the mold is broken and thin.  Again, not an ideal situation but it works for the purpose of making inner-sole samples.