Molds and casting fun

[AF350]

If you put the molds in a pressure tank when you make a casting, you will eliminate or minimize the bubbles in the castings. Many people use a paint sprayer bucket.

I have also heard that de airing in a vaccume jar does the same thing, they also say a light dusting of talc in the mold also helps bubbles come to the surface and pop.

I am collecting stuff ro make a spincasting machine to help avoid any voids by useing centrifugal force to draw material in to the molds.

I noticed that now several suppliers are selling powders to coat molds with to give the look of metal to the detail surfaces of a casting.