Homebrew PCBs

Do you re-humidify before or after running it through the printer?

Chuck
WB2EDV



----- Original Message ----- 
From: "DJ Delorie" <dj@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, February 10, 2008 8:37 PM
Subject: Re: [Homebrew_PCBs] Trouble producting transfers


>
> One trick with the pulsar paper is to re-humidify it.  Put it in a
> sealed box with a container of water for a few minutes.  What I do is
> use an inverted Tupperware cake holder (i.e. deep side down) with 1/2
> inch of water, then the broiler rack from my toaster oven (1" high),
> the paper (glossy side up), then the "bottom" of the cake holder (now
> on top).
>
> Rehumidifying gets me a much better toner layer for the transfer.
>
> The rest of the process seems like what I do.  I let the laminator
> heat up for about 1/2 hr, run the board through 4 times (once in each
> direction) then into the water (re-using the cake holder for this).
> If the toner doesn't stick, you didn't get it hot enough.  If it
> transfers properly, you should be able to lightly wipe off the water
> with a paper towel, without removing the toner.
>
> A hair dryer will NOT get hot enough to make a difference.  They max
> out at around 120F, you need to get higher than that to melt toner.
> Either use an oven, a heat gun, or the laminator itself to preheat the
> board.
>
>
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> Photos:
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