On Tue, 01 Aug 2006 00:06:19 +0200, Herbert E. Plett <
cachureos@...>
wrote:
> Stefan:
> what are those black spots on your etched boards?
What black spots?
You mean the blackened areas of copper? That's what the problem is - the
resist giving out halfway through and allowing the copper to be etched
partway.
If that's what you meant...
> re picture labelled 'acetone': I would never even try to use a board as
> dirty
> as this looks for toner transfer. (does not look like photograph
> artifacts).
> it is definitely not going to work out ok...
I dunno, looks pretty clean to me! I use the same cleaning (even less
careful) for TT with no problems.
there isn't really much i can do other than abrade the surface and then
remove the dust and remaining grease...
ST