Homebrew PCBs

My "Darkroom" is my shop in the basement with a 60w bulb in the
corner. This provides sufficient light to work by and still allows for
long times working with the photo-pcb's before developing.

I know it could be brighter but this seems sufficient to see by and is
very board safe.

- phil
KA0HBG

--- In Homebrew_PCBs@yahoogroups.com, "Leon" <leon355@...> wrote:
>
> ----- Original Message ----- 
> From: "DJ Delorie" <dj@...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Wednesday, April 11, 2007 4:26 AM
> Subject: Re: [Homebrew_PCBs] Newbie questions
> 
> 
> > Second is photomask.  You buy pre-sensitized boards, print to a
> > transparency, and use UV light (or sunlight) to expose the mask.
> > You'll need some chemicals to develop the mask, and a mini-darkroom.
> 
> You don't need a darkroom, standard positive resist isn't affected by 
> daylight or artificial lighting during the process provided that it is 
> developed soon after exposure.
> 
> Leon
> --
> Leon Heller
> Amateur radio call-sign G1HSM
> Yaesu FT-817ND and FT-857D transceivers
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> leon355@...
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>