Re: Printed Circuit Board Supplies

hansw wrote:

> From: hansw <hansw@...>
>
> Jon,
> Thanks... I used "Positive 20" for many years, it comes in a spray can
> and works real well.... ( �3-4 in the UK per can )
> Then just like sliced bread , I preferred the board ready made...
>
> I have found one place that sells the same 6"x9" for $9.90 which is
> better ...
>
> http://www.oselectronics.com/ose_p78.htm
>
> Any idea what Kepro's new URL is ?

Same as their old one, http://www.kepro.com/ They just moved about 3
miles.
If you've never used dry film resist (used in practically all PC board
manufacturing) you
won't believe how good it is. I can leave a board in etchant for
several hours without
HOT etchant attacking under the resist. I have rarely had a bad resist
development
since I switched. (I used KPR before, and it was almost impossible to
get better
than 50% good boards at the resist development stage. And, the resist
could barely
tolerate 10 minutes in cool etchant before getting full of pinholes.)

I switched about 15 years ago, and after doing about the 4th board with
dry
film, I threw out all my KPR stuff with delight!

Jon