Homebrew PCBs

> Do any of the sensitized boards or materials react to INFRA-RED light?  
> I have an infra-red laser diode on a cnc machine, its not powerful 
> enough to cut stuff with but will smolder black foams.  I was wondering 
> if its possible to use that to rastorize the image, but I dont know 
> about all the different types of sensitizer or what types of lights 
> they react to.  I know in screen printing, they make types which react 
> to a 4k watt metal halide bulb, and newbie stuff that works with a 150 
> watt lightbulb.

I don't know about any of the board materials being sensitive to IR. 
As far as I know, the silkscreen materials are sensitive to UV,
depending on the material, with a peak sensitivity at either 360nm or
420nm.  That is why a MH lamp works so well for exposure.  I just did
a screen using Chromaline ProCap film and the exposure was 40 min 32
inches from a 400 watt metal halide.

Kevin