Inspired by a post on NUI Group Community Forums by Tinkerman I decided to give FTIR (to be accurate, a combination of DSI and FTIR.) a try, creating my first owncompliant surface. The described technique of applying a layer of silicone to a projection surface seemed to be much easier than other methods, such as pouring silicone directly on the acrylic sheet.
To get started, I got hold of the following items:
- Drafting film (waterproof, not requiring an additional protective layer)
- General purpose clear silicone (cheap stuff)
- Foam roller (to actually apply the silicone)
I applied a single layer of silicone to the drafting film, using the foam roller, and let it dry overnight. I did not use any thinner but the silicone as it comes out of the tube.
The result definitely exceeded my exceptions! I put the newly created compliant surface onto my EndLighten acrylic – et voilá! Bright blobs became visible wherever I touched the surface; and none of the contacts got stuck on the surface. Just to do a little experiment I added another layer of silicone – but I couldn’t tell any difference.
The only disadvantage I can see so far is that the drafting film is not as great of a projection surface as the rear-projection acrylic I was using before. Also, some stripes caused by the roller a visible (a wider roller would improve the result).