Step 1: Mold Making
Every laser cutter uses a bit different software, so I haven't gone into detail as to how to set up and etch the design. If you don't have a a cutter of your own, you could always use an online service to make this part for you.
A few notes on design:
*Small details might get lost in translation, and will take extra care when removing the stamp from the mold.
* Use rounded, sans serif fonts to limit the finest details in the design.
* Don't cut the design too deeply. 1/16" is MORE than enough. The sugru is quite rigid when dry, so a little depth goes a long ways. Designs with less detail have more tolerance for deep cuts.
Step 2: Apply Mold Release
Step 3: Open and Kneed Sugru
Remove the Sugru, and kneed it into a flat piece, roughly the same shape as your stamp mold. I used an entire packet, because I didn't know how much I'd need, but I could have gotten away with less.
Don't worry about using too much, as it'll be forced out the edges, and easily trimmed. It's far more important to have a uniform piece than a particularly thin one.
Step 4: Apply Sugru to Mold
Step 5: Add a Handle
Press the block straight down onto the Sugru, preferably without any twisting or sliding that might shift the Sugru underneath.
Step 6: Clamp and Wait
Because there's not good airflow around the Sugru, curing might take longer than normal. In this example, I waited several days, and probably could have waited longer.
Step 7: Remove and Use
In any case, start from an edge and gently peel the stamp away. Avoid twisting or tearing to preserve the fine detail of your design.
Apply ink to your stamp with a regular stamp pad, and use. Notably, my stamp here is a bit defective, due to an issue with our laser cutter. Happy Stamping!