Casting

[jknaus]

Saw this and thought, hey cool.

https://www.youtube.com/watch?v=saOHcz4ehpQ

From PlasticModelworld.com

James

 

[ausf]

Well, technically speaking, silicone is silicone, so caulk will eventually set.

But as the man said, 'ya get what you paid fer.'

I shudder when I see guys pouring resin like that (plaster was way too thin as well, it'll disintegrate into chalk over time like that). Eyeballing hardeners makes me chuckle, but during the hardening phase, most resins shed some nasty isocyanates that'll shut down your lungs pretty quick. Not the lightheadedness you may get with solvents, but they literally bond with any water anywhere to form a crust. Could be on a glass of water (I have a friend whose aquarium was destroyed after a spill), but most likely on your moist lung surfaces if your head is right over it. And there's no respirator that filters the stuff either. If you do it, please be smart about it.

 

[SA Dave]

I have been thinking of using some plaster of paris for diorama pieces (Got a few rubber molds for things like bricks) but mixing some white glue into the mix - Should really try it out at some stage

 

[Heavens Eagle]

That is interesting Ausf, did not know that. As I have been using very small qtys on the order of about 8 drops total and then placing a clean slightly greased piece of acrylic over the resin in the mold so it has a flat bottom, I guess it hasn't even been a real issue.

 

[White_Wolf]

I have been thinking of using some plaster of paris for diorama pieces (Got a few rubber molds for things like bricks) but mixing some white glue into the mix - Should really try it out at some stage

Worked fine for me. Get the mix right and you will end up having a very nice and smooth surface, the whole thing being surprisingly strong.

Laurence

 

[SA Dave]

Thanks Laurence great to hear my idea will work