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Subject: Re: black photoresist masters - darkening

From: "derekhawkins" <derekhawkins@...>
Date: 2005-07-25

> I'll see if I can get some Xylol.

Homedepot sells it if you live in the US. If not, it is also called
xylene or dimethyl benzene.

> What's the procedure for vaporizing then?

Pour to about a 1/2" level in a container with mouth larger than the
area covered by the artwork. A plastic container (like a sandwich box)
can be used provided it's not also used for storing the xylol. Place
the transparency with artwork facing down over the mouth of the
container. Place a piece of thick cardboard with some form of weight
over the transparency. Check after 15 to 30 minutes. Careful, wait too
long and the toner may get so wet that it starts to run. Store the used
xylol in a sealed metal or glass container for reuse when done.



--- In Homebrew_PCBs@yahoogroups.com, "hjf2k2" <drgenio@h...> wrote:
> I'll see if I can get some Xylol. What's the procedure for vaporizing
> then?
>
> > 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.