Karel Kulhavy wrote:
Here's a board etched with it:
http://shop.cottagematic.com/elab/etched-board-epson-photo-paper.jpg
This photo was out of focus, but it's easy to see in a bubble tank when
laminate substrate is showing -- copper can still be seen on the bottom
edge. http://shop.cottagematic.com/elab/etch-done.jpg
What are the black stains? Places where the patterns were accidentally
etched through? Or some kind of corrosion?
[jg] Those are places where the adhesion of the transferred toner was imperfect
and it shows copper oxide black color. Those places did not etch much though.
I may need to add a scrub with some acid cleanser before soldering or
electroless plating.
Is it a picture taken during the etching process or after?
[jg] Pink copper with some black stains is after, Blurry green is during.
CL<
John Griessen
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