For a school project I had to make a soap that would have my project's logo on it.
This instructable was made by a DIN 2012 member
Step 1: Making the logo
To make the mold, you need to make a plastic model of what you want the soap to look like. This model will be cast into silicone which will be the actual mold so you don't have to flip the side of 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.