Plaster mold has mold (bacteria)??


New Member
Hi all- recently I had to make a quick latex half mask and since I only needed one or two castings, I just used plaster of Paris since it was cheap and what I had at the moment. Everything went smoothly and I got one casting out of the mold, but the project had to be put on pause for a few days. As such, I left the mold just out on my work table. When I went back to start make another casting, I noticed that the mold had developed many tiny dark green spots, of what I assume to be mold. Do you guys know what caused this? And if there’s any way to clean or sanitize the mold, and even more of I can still make another latex casting from the mold? I can post a pic if you guys ask too any help would be great


Sr Member
Also let some air get to the mold!,
Clean with bleach dry and lie flat so the air can get in, this happened to me all the time.