- April 19, 2019 at 10:46 pm #38717
I just finished my first attempt at resin Petri dish coasters using a silicone mold. They looked great til I took them out—then I saw that that all 3 were basically Caved in in the center of each. This caved in portion only effected the top maybe 1/3 of each coasters thickness. The bottom of the coasters are all smooth as glass.
Any idea what I might have done wrong?
- April 20, 2019 at 11:26 am #38758
It’s been my experience that when doing the Petri technique, the tops want to cave in like this. I suspect it has something to do with the alcohol in the inks as I don’t have this when using other items.
If it were me, I would add doming resin to the back of the ones that you don’t like to finish them.