can I cast resin in alginate?

[Hecubus114]

I need a one off cast of something - would I be able to cast Smoothcast 320 in an alginate mold? Thanks!

 

[Finhead]

I need a one off cast of something - would I be able to cast Smoothcast 320 in an alginate mold? Thanks!

Yes, one times all you get though.

 

[exoray]

You can one time but don't be surprised if the resin erupts like lava from the moisture...

 

[Ghost Host]

I know it's possible. I've done it with a resin-thinned bondo as well as 1630 Urethane without any moisture issues... just blot out the excess water before pouring in the resin.

 

[chuckyAPP]

Monster makers.com sells a product called water trap. I've used it and it works perfectly with alginate molds. Mix equal parts A B and water trap powder in to the resin and pour into the mold. Really cool stuff.

 

[fettster]

It's very easy with a few precautions, first, swill the alginate out with acetone. Doing thing with wick away the surface moisture, then spray a light coat of laquer over the alginate and when that's dry, dust some talc onto the surface, then put your resin in. The quicker th resin kick, the less chance of it inhibiting so you could always make sure the mould or resin was warm to accelerate the cure