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Subject: Re: [Homebrew_PCBs] Toner transfer problems

From: John Coppens <john@...>
Date: 2010-04-19

On Sun, 18 Apr 2010 23:03:57 -0000
"andrewmv@..." <andrewmv@...> wrote:

> Any tips or ideas?

Just a few suggestions (learned the hard way):

- Don't use 150 grit, it's way too coarse, just as Andy said. I use
'steel wool', the fine variety sold for cleaning surfaces. If not
available, go for at least 300 or 400 grit. Unlike Andy, I never had
problems with Acetone, but I guess after the thorough cleaning with steel
wool, there wouldn't be any grease anyway.

- I've never seen mentioned that you should lay the board on an
insulating layer, but it _is_ needed. I use a newspaper (at least 10
pages). If no insulating is present, it's quite possible that heat is
drained from the board on several spots.

John