Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "scratch_6057" <dml.empsrch@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, August 27, 2006 4:35 PM
Subject: [Homebrew_PCBs] Re: A differen direct inkjet printingtechnique for
making PCBs


> Leon,
> As you probably realize if you print on transparency material
> the image needs to be reversed so that the Ink can be in direct contact
> with the photosensitive coating on a board. Otherwise the thickness of
> the transparency material allows light to leak around the edges of the
> image, resulting in "undercutting " of the image. Wouldn't a gelatin
> coating produce the same type of "light path" under the ink image? How
> do you propose to evenly apply a gelatin coating THIN enough to avoid
> this? Have you had the opportunity to test the process?

That could be a problem, but the gelatine could probably be made thin
enough. I don't have a suitable printer to test it.

Leon