|The First Skull|
Back in the workshop I taped up the seam of the mold and mixed up a batch of plaster. The first pour went well and after an hour and a half a came back to do the second. This is where things started to fall apart. I mixed up the plaster but was completely unable to get the right consistency. Moreover, the plaster was on some sort of speed setting because it began to set up almost immediately. I tried to add more water but it just kept getting harder and harder until I finally had to abandon that batch altogether.
A third batch also seemed too thick with a 2:1 ratio of plaster to water so I added a little more -- almost 1:1 -- and it looked an appropriate thickness, though perhaps slightly on the thin side. When I poured the mix into the skull, one area from the first pour, about a dime size in diameter, flaked off though the rest remained intact. I completed the pour though and set it aside, quite frustrated actually. I would let it cure through the night.
|Cracks in the foundation|
In checking NoahFentz's tutorial again (as must be painfully obvious by now, I do first and read afterwards), I realized he said use two cups of plaster mix to one cup of water. Oooooooh! Well that partially explains the thinness of the pour. I did one cup of plaster with the two pours (I also realize now why you're just going to be getting just 14 skulls out of one bag).
|Thin as a rail|
I was worried initially that because the latex mold itself was somewhat on the thin side that it would flex and crack the pour as it was setting. That may in fact be what caused that piece to flake off. But had I used the proper amounts of mix to start with it ought not to be a concern in the future.
Regardless, this was a fun project and I can see that I will indeed end up with dozens and dozens of skulls as a result.