--- In
Homebrew_PCBs@yahoogroups.com, "mikezcnc" <eemikez@c...>
wrote:
>
> The simplest way to understand it is to buy that paper and test
it.
> Then let us know. The paper is cheap, you said, right? Mike
>
I am not at all convinced one paper is better than another. During
the last few months I have been using up some glossy HP Inkjet
paper. It's pretty heavy stock, but it's been working most of the
time.
The first two variables that sort of monkey wrenched the paper thing
is this...
With one brand of PCB material, the transfer was easy and perfect.
The same day and within minutes of doing one with "Board A", I
couldn't get anything to work with "Board B". Both were single
sided, 1 Oz, 1/16 thick stock but by different companies.
Then I tried pre-etching the boards (Brand B) and that took care of
the transfer problems.
This particular paper would take forever to soak off (it is thick)
and would leave a film. Then, using the same paper a couple of days
ago, I transferd the image to a board, tossed it in some water and
the paper came right off - no white residue - same paper as I was
using. I think there might have been two differences...
1) When I would have trouble getting the paper off- I was letting
the board cool before putting in water. The humidity was higher.
2) When the paper came off and didn't leave any residue, I didn't
let the board cool before putting in water and the humidity was much
lower (very cold outside).
I don't think it is iron temp - I set it and check it with a digital
thermometer. I don't think it is presure, I press the same way
every time. I don't think it is pressing time - I watch the second
hand of the clock and count off my 20 seconds for each pressing.
So, I have a hunch there is much more going on that just a
particular brand of paper. I think there is much to do with
enviroment and even technique.
In my last battle with bad transfers (with board brand B), I tried
magazine pages and frankly found that to perform as good as anything
i have tried so far. I just have to remember to use that, rather
than reaching for "printer paper".
It sure is interesting though seeing all the goods, the bads, and
the downright uglies when going through this process!
Chris