5 years ago#1
PoohBella5
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I am having a hard time finding a company that will make molds of my original sculptures without damaging the surface. Are there any mold making companies that specialize doing this?

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5 years ago#2
copper
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hi PoohBella5, welcome to the forum I am happy you joined us.

There are lots of these companies offering that type of service, have a look for example HERE (please click) but it depends on where you are located at as well.

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5 years ago#3
brad
Guest

here is a whole list of moldmakers for hire: http://www.smooth-on.com/p101/Moldmakers-Exchange/ pages.html

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5 years ago#4
Moblofc
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5 years ago#5
mirijou
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You need to sculpt in Klean Klay from Art Chemical company or Chavant at www.chavant.com.

both of these plastilene clays do not have sulfur in them . The reason that the surface is being marred is because if you use any other sulfur containing oil based clay they need to seal the surface or the rubber will not cure - the sulfur inhibits the cure of the rubber as adhesives do, and superglue and oils do. What is happening is they are sealing the surface and then putting on a separator and then applying the rubber and that is why the surface is getting marred

Mirijou

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5 years ago#6
pabrad
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water based clays can also cause problems with inhibition as some rubbers will not cure against wet surfaces; or if they do they may not produce the result you are looking for...

which ever rubber you use, you MUST know about it's compatibility with the model surface or what the model is composed of... otherwise you risk destroying your model and wasting money on mold making material because the whole experience failed.

if it's something you don't want to devote time to, hire an experienced mold maker; here's a list of mold makers for hire:
www.smooth-on.com/p101/Moldmakers-Exchange/pages

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5 years ago#7
RTV Steve
Guest

Most of the time the original gets damaged in the mold making process. that is why it is important to use a high quality silicone for the mold so you can make exact duplicates. If it is a clay sculpture it will get damaged .
www.rtvmoldmaking.com

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5 years ago#8
hmmsoup
Guest

Tin cured silicone is not affected by sulfur in clay. Any tin cured silicone should work just fine as a mold rubber. If the sculpture is in soft clay it will be damaged by the mold process, however, once you have the mold you can make as many as you want just like the original!

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5 years ago#9
Jeff
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To answer your question directly I don't know of any company that makes molds specifically for your application. I do know, however, that people have come to me with this exact same problem.
Whenever I make a mold I try to reassure the customer that a successful casting may mean degradation of the original. I've been fortunate to have had great success in not damaging originals.
The secret, as others have mentioned, is to match the molding material to the model material.
I find urethane to be very forgiving, btw.

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4 years ago#10
sculptureIQ
Guest

I generally try to create my own molds- there are some really cost effective, easy-to-use products, but you must make sure that you choose your products with care.

If they arrive on time, Townsend Atelier's Knead a Mold and Brush a mold, which work in conjunction with their Swell Shell, are easy to use. Beware, though. Townsend Atelier has great customer service until something goes wrong. Townsed Atelier's customer service folks take your money, make promises, and then you may have to wait months for your product to arrive.

I recommend trying to make your own molds, but stay away from Townsend Atelier.

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4 years ago#11
red46
Gold Member
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I'm a custom mold maker. You can contact me at <email>

As for not disturbing the original, it depends on what the sculpture is made of. I can help with that.
Judy

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1 year ago#12
Wolff
Gold Member
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Jeff wrote:

I find urethane to be very forgiving, btw.


Urethane is very sensitive to any moisture that may be in the model, the board it sets on, even wood tools etc., silicone is a much better more forgiving mold compound that doesn't have that problem, in fact the rubber I use can be molded over moist or wet clay with no problem at all.
Urethanes that pick up any moisture can stop curing and wow what a mess!

On the mold making and damage, making a mold of a delicate, old original, or an original carries some risks, the rubber could react and fail to cure, (common) the rubber could be defective as a batch and fail to cure (rare) the rubber can stick like glue to the original despite use of release (had that happen with a wood carving, I had to burn scrape and melt the rubber off it)
The mold maker can **** up, it happens.
If spraying on a sealer or risk of damage is unacceptable to you, then don't have a mold made.

The only rubber I know of that Ive used twice on delicate antiques, both were painted wood, is Body Double by Smooth-on, it will not stick to anything, no sealer or relase was used, and is a simple 1:1 mix, ready to pull off and use in less than one hour. It is VERY expensive and for large pieces the cost would be prohibitive.
It was around $100 plus shipping for 2 trial kits, about 4 pounds worth, the 2 trial kits I ordered was just enough to make a mold of a flat plaque about 10"x 10" or so.
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1 year ago#13
Gee Bee
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Great info. I would not have thought of that.

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