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Ray Hope
Joined:
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05-Feb-2006
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Started On : 30-Dec-2006 at 08:54:04 PM, #Views : 6029
Topic Subject : Re: Re: How to avoid Dimples in alginate? |
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Thankyou for all the replies. They have been very helpful.
Dave thanks for the offer to help and talk by phone. I will watch your DVD again and pay close attention to the fibre adding and plaster technique. BTW I'm in Australia. Despite the time difference and cost, I want to get this right and it is worth it to call you. So after watching your DVD again I will try to call you in the next few days.
I have only had this problem with our last two casts, so I was confused why it is happening now and not on eairlier ones.
To me it looked like the dimples were in the alginate surface. My theory was that we were pushing the cotton wool into the alginate with to much pressure as the alginate was setting, and maybe the alginate was too thin in those areas.
My other theory was that I was mixing the dental plaster too thick. I used 2 parts dental plaster to 1 part water. The mix was runny at first and we could apply with a brush, but thickened very quickly and was scooped out of the bucket and applied by hand and smoothed. My thought was that the thicker plaster may be deforming the mould.
The previous two casts which turned out great were of a female and male bodybuilder, just before and after comps. They had next to no body fat and were very firm to say the least.
For the Female we used Mold Gel Slow set. For the male we used fibre gel, for the first time, and the slightly faster setting time and hot weather cought us out and it set before we got the cotton wool on. Even using Algislo didn't help. When we removed the mold, the plaster shell came away from the alginate and the alginate tore in a few places. Luckly the fibre gel was strong and we were able to lay it back into the shell and join it all back to gether. With some fine finishing on the joins it turned out really well despite the problems.
The two moulds that we have had trouble with were of a very slim model, but still with plenty of give in the skin. Not sure if that really makes any difference, but most people will be like that so we need to be able to get it right.
Thats again for all the help.
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