Friday, November 27, 2020

More resin castings

As I was using the last of the resin as long as it was still usable, I decided to make some castings for boot making. For shoes, you only need the casting to be up to the doll's ankle, but I wanted to make boots for Gooliope. 16" dolls are especially difficult to handle when making shoes, so having just the leg below the knee makes things a lot easier. As I was going through the trouble, I thought I might as well make some others. The other doll in the picture below is a Living Dead Doll.

The picture shows how messy it is to create latex molds. Latex keeps dripping for some time after dipping the doll's feet to it, so you need some protection, in this case a newspaper, on the table.

At this point, I had to start calculating the amount of resin required, so I wouldn't have any resin mixed without having a mold to put it in. The easiest way to check the amount needed is to put some water in a measuring cup and put the doll's feet in it. The rise in the water level shows the amount needed. Unfortunately I didn't have a better measuring cup, so the numbers were only approximates, but that's better than nothing.

You also need to remember that if you're using resin with the ratio of 1:1 between resin and hardener, you need half of the measured amount of both. Elementary, but can be easy to forget when you keep thinking that one number you just measured.

The latex molds I made were fairly thin as you can see in the picture. They were only needed for one casting, so I didn't see any need to make them real sturdy. The third pair in the picture is for a My Little Pony Equestria Girls doll. 

Below are some castings waiting to harden. The big pair is for a 16" male doll by Robert Tonner. The ones with flat soles usually stay upright by themselves, but the Equestria girls molds needed some support, so I put them into a small plastic cup.

Finally, here are some hardened castings that have been removed from the molds. They still need to harden some more after removing them, although these are so thick that there was no risk of anything bending. When making shoe soles, it is important to always check immediately after removing them from the molds that the shape is correct, and if it is not, fix it as long as the resin is still soft enough to do it.

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