On Thursday 01 March 2007 12:28, docstein99 wrote:
> I was wondering if anyone can give me some advice, looking at the
> threads recently it looks like lots of people here have tried
> sensitized boards.
>
> This material appears to be the same stuff as silkscreen printers use
> on silkscreens, where the exposed areas to intense light are hardened
> and the unexposed areas are washed away with water.
>
> 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.
Phillipe Terrone, the editor of makezine.com, had some luck using a CO2 laser
to do this:
http://www.makezine.com/blog/archive/2007/01/how_to_use_a_la.htmlWhat he did was spray the copper board with black spray paint, and then he
used the CNC laser to selectively burn off the paint, exposing bare copper.
He then chemically etched the board in the usual manner..
-Sebastien Bailard
RepRap.org - self-replicating 3D printer project.