I want to make silicone "castings" of my baby's hand and foot prints that I made out of those air drying clay kits. Will this destroy them?
899961
No. Its really soft and doesn't stick to anything. You still might want to spray the castings with Crystal clear before applying the silicone
1283107
Yes - you can make nice casts of items with good detail and then use another medium to build - I used green stuff myself. On point to mention - I tried this with resin plastics and the heat created by the plastic destroyed the mold - I did get a decent copy. I just melted the instant mold and used it again with no real harm. Very nice to those one off molds you may need.
2190148
Yes. I make two part moulds out of them all the time. As long as you know what your doing with the mold and the 'key' you'll be right. It's quite flexible when set. I use it to cast liquid plastic ( type of resin) slot cars
7587
It probably can but it is a little porous. Its slightly fragile but will work in a pinch. When you pulled apart the mold it might shatter or break into smaller pieces. If you have a choice I would pick something more durable. this is better used for something like pouring into a cast and set in shapes for children to paint or artistic projects. I used it for a mosaic table top and had issues with corners flaking and it easily chipped. hope this helps!!
1283112
I don't have much experience with this product. I've only tried it once with poly clay pushed in the mold. It reproduces well, but isn't very strong and will tear if you're aggressive with it.
163731
can't hurt. After washing, I use CRC Food Grade Silicone on my meat tenderizer and my grain mill which are both cast iron. It dries quickly and leaves no noticeable residue. It's safer than regular silicone.
1874326
Yes and not under any conditions I can tell. Silicone in general tends to be nonreactive, outside of a chemistry lab or thrown in a fire, they should last many years. I have not damaged mine in any way, and I'm a clutz.
981756
Check their website, but I wouldn't recommend alcohol on anything made of silicone (or any other petroleum-based material). The silicone will dry out much faster, though you may not notice it at first. If mild soap and warm water (not hot) doesn't do it for you, try hydrogen peroxide. As with anything like this, use sparingly and dry thoroughly. Also, based on your question, I'd suggest cleaning them AFTER use, and storing them in the case clean, then they're ready to go when you are.
1939322
I found about 9% shrinkage in the clay. It will be about a 70% chance of surviving the kiln. The longer/dryer you get the clay the less it will Crack when fired. Overall it is a very good clay as far as wet clay is concerned. Crack free clay would be non sulphur based oil clay. But you don't fire it. You cast it in silicone
1886180
Sort of, but i would use silicone putty instead (Alumilite). Alginate is great stuff, but it just helps create a negative mold, not the final positive product. Mix some up and put your hand in it. Alginate does not "dry"; it "gels", and sets up like hard jello. It is always somewhat moist, and needs to be kept wet. It is most useful for making casts from other water-based products, like plaster of Paris, or Permastone (a much harder cement). If you want to make fake teeth, you want to cast with some plastic material, and for that a silicone mold is much better.
426292
I've seen it done with 2 part pastic resins on a review on brush4hire.com the reviewer pointed out the thermal reaction from the resin setting can cause your mold to warp so let it set completely before you remove your cast.
1533609
The mold is high grade silicone and can certainly handle the high temps however, the manufacture is the one that must certify whether the silicone is food grade or not. This is from China and there is just no way to determine from the data provided whether it is food grade or not. Best to go with the ones that say "Food Grade" Silicone, or to purchase where you can talk to the vendor, like on the ETSY web site.
1615655
Probably not. When wet it is an Elmer's glue consistency. When dry it is smooth, but not a like hard ceramic glaze. I could see it possibly melting or becoming sticky to the touch.
2018785
well.... you will need to sand your items smooth after printing... that is if smooth is what you want and you are making molds for the jewelry process... I know of none that make perfect smooth surfaces... so as long as you know that you will need to sand your item that you are casting from... then yes
1610028
I have no experience with clay polymers but this thing will stick to almost anything. Now if you use it right, its almost dry upon contact.
2157887
I can say yes to Crayola. I haven't used any other kind, but I don't see why you couldn't - basically have to keep you hands wet to mold the clay. As long as you have that type of clay, it should work.
2102343
The short answer is yes. The issue comes in on clay is the complexity of the mold and the ability to remove particulates from the mold once completed. For clay I usually make an alginate negative and then a plaster or dental stone positive that I then make my rubber mold from. The alginate does a great job in retaining the detail from the original that is translated to the stone. As far as release agent you can use a standard release or just an aerosol cooking spray (Pam or whatever). Some have used things like vaseline but I don't like the thickness as it is hard to keep it from pooling in crevices and hard to get out and may interfere with detail. But if your part is smoother you can apply a little to your hands, warm it up by rubbing together and apply a very thin layer and that will work as well.