Re: Bob the Alien Sculpting finished page 45
Good god that's beautiful. Vacuum would be your friend with that I expect! Looks like a real job of work to pull cleanly.
But...just...my god, man. Wonderful work.
Thank you mate
Leigh, that looks amaze balls!
Yes, that is going to be a challenging cast to get bubble free.
Either vacuum, pressure or rotocasting is the way to go. If you can rotocast with a water consistency resin that isn't too quick on setting you would get it into all the details. Ebalta make a 15 min resin called SG2000L that would work. Of course that also means making a rotocaster. Your mould would need to be carefully designed in a few pieces.
Good luck, it does look fantastic and taking your time with the mould and choosing the right process will yield great castings. :thumbsup
Thanks Mark
I've been using the SG2000 since the beginning on your recommendation & I have a rotocaster
This part is a effectively a prosthetic that fits over the original jaw & head castings. Its been sculpted onto a set of casts that have been bonded together just for this part.
The intention is to cast this in water clear rubber, the casting issues I'm likely to have are just because its going to be thin in places.
I'm thinking I'll need to make a hard outer mould (the inner mould will be the part this is sculpted onto), drill lots of carefully placed small holes for air to escape & inject the rubber in there using a syringe (I'm thinking a cooking syringe should do the job). That's the only way I can think of to do this successfully without expensive equipment.
The other issue I have is what rubber to use....
I could use Latex, it would be stiff enough to support its shape, it would stretch enough for the jaw to open, it would be easy to paint & bond to the castings but it will degrade over time.
I could use Silicone, again it'll support the shape, stretch no problem & it wont degrade but it'll be difficult to bond & paint.
Lastly I could use urethane rubber, it'll support its shape well enough, it'll be easy to paint & bond, it wont degrade but its not as elastic as the others & in water clear there aren't as many options when it comes to hardness.
So there's my dilemma
What do you think?