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Subject: Re: [Homebrew_PCBs] How to calculate effective mil values from printer dpi

From: Kamal Shankar <kbshankar2000@...>
Date: 2006-06-23

> I think the limit is underetching here, not the
> printer. If i remember
> right the 3.33mil line looked fine before the etch.

Stefan - my "limit" currently is my procedure for
removing the paper from the copper clad after doing
the transfer.

The method I use serviced me well till now (when I
started to do < 10mil), as currently all thin traces
(<10mil) just feel bad about themselves and say bye
bye alongwith the soggy paper.

So right now, I have to use a Sharpie to correct those
tracks :(

Hmmm... maybe I should learn the correct way to remove
the paper...

Currently, after doing the transfer I immerse the clad
in cold water and then lukewarm water for 5 mins (till
the paper becomes soggy)

Then I gently ruboff the paper in running water, and
right now all thin traces (and some parts of ground
plane) are saying bye bye ....

What method do you use ? Will soaking it overnight
work ?

I heard that soaking it overnight may even lead to the
paper falling off by itself ?

The funny thing is, the toner which sticks to the clad
takes hell lot of effort to scrub off (I have since
resorted to using acetone - Thanks mycroft!)

But the 10mil traces and random parts of ground plane
seem to be not so stubborn :(


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