Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "docstein99" <docstein99@...> wrote:
>
> Ok, well I can buy a UV laser diode too just as easily as I bought a IR 
> diode.  
> 
> Can I handle the emulsion or film in regular room light with the high-
> intensity stuff?
>


No, yellow bug light is required.  Most of the diazo or dual cure
emulsions require long exposure.  There is one, indirect capillary
film, Chromaline's product is called Reflex, that is exposed prior to
being put on the material, developed, and then applied.  It comes on a
plastic backing sheet.  I think the exposure speed is about one third
of the the diazo products.  There is one in between, photopolymer,
that is about twice as expensive.  Reflex suggests a 25-40 second
exposure from a 5000 watt!! Metal Halide at one meter.

Kevin