This instructable was made by a DIN 2012 member
Step 1: Making the logo
To make the logo, I used a laser cutting machine. You have to have a version of the logo on Illustrator. I had to simplifie the logo. The silicon will take every little detail, but the soap is not as permissive.
Make the logo 5% bigger than what you want to obtain. The silicone doesn't shrink much, but the soap does.
I used a sheet of cast acrylic for this part of the model.
Once cleaned, you should obtain something like this.
Step 2: Making the soap model
I did the soap in two parts to be sure it would work. In the end I will have two molds: the top with the logo, and the bottom (by which I pour the soap). In the upper part (shown on the right) I left an empty space for the logo.
Again, make the model about 5% bigger than wanted to compensate for the shrinking of the soap.
Step 3: Preparing the casting
Make sure you don't use to much glue under the models or silicon might infiltrate underneath.
Make sure you use a lot of glue around the cavities or silicon might leak out.
Step 4: Casting
It's an easy to use product. all you have to do is mix equal volumes of part a and part b liquids and mix. You have plenty of time to act and it takes only 6 hours before you can release the mold. As it is silicone, i did not have to use release agent, but you shoul do a test before. You can use an old paint brush to
Make sure you use disposable cups because you might not be able to use them after. Once cured, the silicone is not dangerous, but before you do your casting make sure to read all the instructions and warnings.
Step 6: Casting the soap
Be careful, the soap can be very hot!
Let stand for at least 20-30 minutes before opening the mold.