Kodak KPR and similar materials:
If I recall correctly, the main problem with Kodak KPR and similar
compounds was that the EPA (or an equivalent federal agency) did not
like it.
I used KPR both at work and at home for many years without a single
incident. The feds claimed that it was an air polluter and banned it.
Dyna-Chem and others made similar compounds, and everyone had to stop
manufacturing it.
I used to purchase the Dyna-Chem material in an aerosol spray can. This
really drove the feds up the wall.
The feds did the same with Freon, although Freon is still available and
used outside of the States.
But I believe the Freon ban was more political than environmental.
At work we would either spin coat KPR (small boards) or dip coat it for
large, or double sided work.
We had the complete Kepro PC fab lab setup with a dip coater, IR drying
box, UV exposure box, and heated spray etcher,
and a shear for cutting .
Some artwork was on lithographic film, and some made on Rubylith cut
and peel
material on a coordinatograph-type apparatus. The Rubylith jobs were
mostly stripline RF circuits.
These techniques are obsolete nowadays.
Everything worked fine......never any problems.
Roland F. Harriston, P.D.
∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗
Robert wrote:
>
>
> Thanks for all the input!
>
> So then avoid KPR even though it works well, is that because it's
> toxic? explosive? staining? if it works then maybe using proper
> precautions, but then on the other hand if there are safer
> alternatives that work as well (or better?) then of course that would
> be the logical preference.
>
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