AW: [sdiy] PCBoards at home

[Ullrich Peter]

Hi!

> >I have some old  kepro photosensitized pc boards. They are  dated 
> >1997. They, of course, are still sealed, but I'm wondering if they 
> >are any good.
>
> The resist (at least what they were using back then) goes bad after 
> about
> 12-18 months. If you open one up you'll probably discover it's turned 
> a deep purple, the same as if it were (over) exposed.

I also have quite a lot of these old boards - positive and negative.
The negative ones are deep purple - but they are OK!
The posiitve ones are light purple and also OK!
Even if they are that old!

So I would check them out before removing the photo layer!

Ciao
Peter

http://www.ullrich.at.tt

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