Imperial Artisans ... The Painters, Crafters & Writers Guilds > Empire Crafts and Skills
Hirst Molds
Dihenydd:
It can help, but I've no trouble with small mixtures. Plus always add the plaster to the water, not the other way round. stir strongly but slowly.
I also use the paintbrush technique for the thin molds but use it for all (ie 'paint' the mold before pouring plaster.
I don't use the shaker but haven't had issues using this.
Midaski:
--- Quote from: patsy02 on May 29, 2009, 09:47:43 PM ---When using dental plaster, are the air bubbles a problem? Do you need to to use a resin shaker to get them out?
--- End quote ---
Same as above - shake plaster into water ............ then ......
I got a square board, around 12 ", and taped a few foam rectangles from blisters to the underside and use it as a 'pounder' - usually sorts all the bubbles.
Nicholas Ironfist:
I have been casting all week. I run 5 molds at a time. I procured dental stone and it works very well. (7kgs for $20 aussie). I'm working on the warlock house and a scratch built port. Pics when finished.
Diddo on the highly recommended, the molds are awesome, lots of fun to use if a bit messy.
Khunag:
--- Quote ---I don't want to use plaster of paris cause its not supposed to work well either.
--- End quote ---
It works great actually. I never used HA moulds, but i made some myself and i'm very pleased with the results.
Dental plaster would be probably better, but i don't feel the need to buy any, i just add some carpenters glue to the mix and the casts are pretty strong.
--- Quote ---Casting each mould once probably takes 30 minutes.
--- End quote ---
I do it in 15 or something like that. The elements are dry enough to get them out of the moulds after that time (depending on the material and mix used of course).
Nicholas Ironfist:
This is my efforts so far...Bofenhafen Harbour
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