I am using a Lexmark e210 printer, the enchants is hot.
I use an iron and a metal plate to heat the board. The metal plate (1/4
steel) is much flatter than the iron and alleviated many of the problems I
was having.
I think I cleaned the board well and I was careful in handling it only by
the edges. The edges were filed to remove any burrs.
I did it again tonight and got a good transfer. On further inspection I
found I could rub off some of he traces with moderate pressure using my
finger. They were all in roughly the same area of the board. Other areas did
not get removed. The tones seems to flake away from the copper when I
scratch it. Again the other areas have good adhesion.
Funny enough there are traces that are stuck well to the copper and right
beside them is a trace that is not, then another trace that is, all within
.2".
I think this is probably what I am seeing in the tank.
I think I will try the baking to reflow the traces as well as using the fine
setting on the printer.
Questions:
1. Should the whole board come out with really god adhesion?
2. Any ideas? Is this a pressure issue (I left the iron and steel plate with
no pressure)? Temp issue (the paper turned brown after being under the iron
for a short time, the copper oxidized where it was not under the paper)?
Time (8 min)?
Thanks for the help I am definitely farther than I have ever been.
John
----- Original Message -----
From: "Stefan Trethan" <stefan_trethan@...>
To: <homebrew_pcbs@yahoogroups.com>
Sent: Sunday, November 30, 2003 12:08 PM
Subject: Re: [Homebrew_PCBs] spray Etching of TT
> On Sun, 30 Nov 2003 12:01:06 -0500, John van Loon
> <john@...> wrote:
>
> > I made a really great looking toner transfer. When I etched it in a
spray
> > tank (standard chemicals not FeCl) several traces got slowly sprayed
> > away. It seemed as if the traces might have been weekly bonded and the
> > spray just washed them away over 1 or 2 minutes. Is this usual?
> > John
>
>
> i assume you have cleaned the board well?
>
> maybe the mechanical force from spraying is too much for the toner.
> what are the "standard chemicals" exactly?
>
> did you use a iron or a laminator?
> which printer model/ toner manufacturer did you use?
>
> please crop your messages!
> especially if you reply to another topic to get the right mail adress
> delete the text of the other post.
>
> st
>
>
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