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Re: black photoresist masters - darkening

2005-07-25 by derekhawkins

> I wouldn't mind about the
> fogging, as long as it lets the light through.

Vellum lets the light through too. In other words the fogging negates 
the gains from using transparencies in the first place. You can get the 
darkened print without the fogging using xylol vapor.


--- In Homebrew_PCBs@yahoogroups.com, "hjf2k2" <drgenio@h...> wrote:
> --- In Homebrew_PCBs@yahoogroups.com, "derekhawkins"
> <derekhawkins@y...> wrote:
> > > It's a spray, cheap, about $7 for the local brand 
> > 
> > Was this "Laser Buddy" by any chance? While it darkens the print, I 
> > find it "fogs" up the transparency somewhat. A respirator with 
organic 
> > vapor cartridges is definitely recommended when spraying that 
stuff. 
> > Got better results exposing the transparency to xylol vapor. 
> No, it was a Spanish brand, "abezeta". I wouldn't mind about the
> fogging, as long as it lets the light through.

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