Hi, I need to cast a figure out of platinum silicone. Which material is best to use as a mold? Also, is there a way to color the silicone (not only the surface, but the whole volume)?
@dneproak Our Platinum Silicone can be cast in itself. Just wait 24 hours between making the mold and pouring the casting. Some pigments inhibit the cure of Platinum Silicone, others do not. Experimenting is the only way to find out which one will work.
I am a novice at making molds, so I made them mistake of stirring the mix too hard and it produced a lot of bubbles in the mold, but I stumbled on a simple fix to this issue on accident.
I noticed that when I blew on the mold, it popped the bubble BELOW the surface. I started to blow with the same force as you would when you whistle, and it removed most of the smaller bubbles after blowing on each area a couple of times.
this is great, but I am wondering how toxic the components are. Are the traces of non-cured parts harmful if used for making parts that re going to be in contact in human skin, or food?
@runcycleskixc Platinum Silicone is extremely safe. To quote the MSDS: "Hazardous components within the meaning of EEC directive 67/548 and corresponding classification:
none ." The product is non-hazardous, but has not been tested for FDA approval. It is not designed to be used on skin to make molds of body parts. We are not aware of any issues of skin contact with the cured material.
@kittynred Platinum Silicone virtually never needs a release. However, it is always wise to test first for that rare exception. Some product can inhibit the cure and need to be sealed first.
On the two part mold. How do you get the little nobs on the other part so that you two part mold stays together better as I see on you video of you demonstration mold.
Then second how do you keep the two part mold together so that your mold in side the outer mold dose not leak all out
@gdiswealth The little knobs (called 'keys') are made by putting indentations in the clay before pouring the first half of the mold. The indentations fill with urethane and become the keys when the clay is removed. The second pour flows around the protruding keys, creating matching holes in the second half of the mold.
@tapplastics Rubber bands are usually sufficient to hold the two halves together. If the rubber bands distort the mold, cut two pieces of plastic or wood the same size as the mold. Place them on the top and bottom and then the rubber bands will compress the mold evenly.
@alister357 Lead melts at about 600 degrees F. Platinum Silicone can handle up to 500 degrees F, therefore is not suitable for lead. There are other metals with lower melting points. Many solders have lower melting points.
Use the same method demonstrated in the "How to Make a Two-Part Mold" video. You can also set the sphere on a short rod in a mold box. Then pour a block mold over the entire sphere. When cured, cut the mold open at the midline of the sphere. Remove the sphere and rod (the rod makes the hole for pouring the resin), put the two halves back together, and pour your casting material.
muy bueno tu tutorial pero cuanto cuesta
fmoranc 2 months ago
nice tip
violetapesterfield 3 months ago
Hi, I need to cast a figure out of platinum silicone. Which material is best to use as a mold? Also, is there a way to color the silicone (not only the surface, but the whole volume)?
Thank you!
dneproak 5 months ago
@dneproak Our Platinum Silicone can be cast in itself. Just wait 24 hours between making the mold and pouring the casting. Some pigments inhibit the cure of Platinum Silicone, others do not. Experimenting is the only way to find out which one will work.
tapplastics 2 months ago
Will it work with clear resin without any issues
MrElpee1205 5 months ago
@MrElpee1205 If you are referring to Clear Lite Casting Resin, yes, it works great with Platinum Silicone.
tapplastics 2 months ago
I am a novice at making molds, so I made them mistake of stirring the mix too hard and it produced a lot of bubbles in the mold, but I stumbled on a simple fix to this issue on accident.
I noticed that when I blew on the mold, it popped the bubble BELOW the surface. I started to blow with the same force as you would when you whistle, and it removed most of the smaller bubbles after blowing on each area a couple of times.
Oobatzxv 7 months ago
@Oobatzxv One of the advantages of TAP Plastics Platinum Silicone is the way bubbles release from the liquid so easily.
tapplastics 6 months ago
aprox. how many casts a mold generated from this silicone can make , before its time to make a new mold ?
bladerj 7 months ago
@bladerj Lots! I have done over 60 urethane castings (urethane is very hard on molds) and the mold is still good. Have not worn out a mold yet.
tapplastics 6 months ago
this is great, but I am wondering how toxic the components are. Are the traces of non-cured parts harmful if used for making parts that re going to be in contact in human skin, or food?
runcycleskixc 10 months ago
@runcycleskixc Platinum Silicone is extremely safe. To quote the MSDS: "Hazardous components within the meaning of EEC directive 67/548 and corresponding classification:
none ." The product is non-hazardous, but has not been tested for FDA approval. It is not designed to be used on skin to make molds of body parts. We are not aware of any issues of skin contact with the cured material.
tapplastics 6 months ago
how much heat this mould can resist..can we pour hot liquids in it.
will be waiting for your reply
mahnoorkiyani 1 year ago
@mahnoorkiyani TAP Platinum Silicone can handle 500 degrees F.
tapplastics 6 months ago
It was never stated whether or not you need to use a release agent....soooo do you need to use a release agent?
kittynred 1 year ago
@kittynred Platinum Silicone virtually never needs a release. However, it is always wise to test first for that rare exception. Some product can inhibit the cure and need to be sealed first.
tapplastics 6 months ago
On the two part mold. How do you get the little nobs on the other part so that you two part mold stays together better as I see on you video of you demonstration mold.
Then second how do you keep the two part mold together so that your mold in side the outer mold dose not leak all out
gdiswealth 1 year ago
@gdiswealth The little knobs (called 'keys') are made by putting indentations in the clay before pouring the first half of the mold. The indentations fill with urethane and become the keys when the clay is removed. The second pour flows around the protruding keys, creating matching holes in the second half of the mold.
tapplastics 1 year ago
@tapplastics Rubber bands are usually sufficient to hold the two halves together. If the rubber bands distort the mold, cut two pieces of plastic or wood the same size as the mold. Place them on the top and bottom and then the rubber bands will compress the mold evenly.
tapplastics 1 year ago
can you pore molton lead in it
alister357 1 year ago
@alister357 Lead melts at about 600 degrees F. Platinum Silicone can handle up to 500 degrees F, therefore is not suitable for lead. There are other metals with lower melting points. Many solders have lower melting points.
tapplastics 1 year ago
Awesome! Can you show how you make the sphere mold? Thanks Great stuff.
Drumvain 2 years ago
Use the same method demonstrated in the "How to Make a Two-Part Mold" video. You can also set the sphere on a short rod in a mold box. Then pour a block mold over the entire sphere. When cured, cut the mold open at the midline of the sphere. Remove the sphere and rod (the rod makes the hole for pouring the resin), put the two halves back together, and pour your casting material.
tapplastics 2 years ago
Is this available on your website yet?
felginator 2 years ago
Yes it is.
tapplastics 2 years ago
There are some issues with your audio, but nice video!
SparkyValentine86 2 years ago