Post Curing

[M-Williams]

The most important factor you have to take into account is that resin tend to expand around 800 .you can cast a light ring or earring studs in satin without any issue .

the only issue I encounter with Boric acid/ plasticast . Ht takes hell of a time for the investment to set.

[Wdshea]

i actually find that boric decreases set time. 1hr benchset works, 3hrs is hard as rock, 2hrs is just right.

the longer a flask is allowed to benchset, the more dense it becomes.

this was obvious since i am vacuum casting, the metal didn't want to go as easily with the 3hr.

[Archerm]

You shouldn't have to use the 2% boric and 2% calcium nitrate in the Plasticast. I have been using Plasticast for the past few months with zero issues. The full cure and the faster burnout has been key.

thanks for the tip, i've been resisting PBI due to cost and our luck with plasticast has been satisfactory. i also use 2% boric and 2% calcium nitrate, that makes my investment VERY hard. especially at 36:100. i recommend those additives to anyone.

our drawback is we had zero experience in 3D design or casting a year ago... so we're trying to figure out what will work for us. fortunately, we're about 98% there.

i'll post some pics sometime.

[Wdshea]

it may have just been my layer exposure being too low, but i won't be changing whats working. it is a bitch to remove the castings, because i let them cool down a lot before removal.

[M-Williams]

You can remove your investment in no time. I have been using this process for the past 10 years.

https://www.amazon.com/EXPERT-3000-PSI- ... entries*=0