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Subject: Re: [Homebrew_PCBs] Re: Direct inkjet resist on 1.6mm FR4 results

From: roger lucas <ralucas4277@...>
Date: 2006-05-01

I wonder if the Tarn-X is leaving a micron thick film
of some sort, or an electrostatic charge or an ionic
bond for the ink to grab before being roasted dry.

I don't recall Steve using Tarn-X in his experiments.
My wife uses Goddards jewellery cleaner, (don't know
whether this is the same thing) and it does strange
things to some metal oxides as I recall.

Eye of frog and tail of.....

Something is happening here which allows Volkan to
achieve such good results.

Roger


>--- Volkan Sahin <vsahin@...> wrote:
>
>Summary of the inkjet PCB steps (mostly cut and paste
>from previous e-mails),
>
> -Using 'Scotch-Brite' and 'Ajax with Bleach' I
.cleaned the board.
>-Using Tarn-X I removed oxide once more.
>-As a tray I used ~20 mils (0.5mm) aluminum sheet,
>using scotch tape I fixed the PCB on tray
> -I handled the PCB carefully to a flat surface
>since ink was still wet. After waiting
>5 minutes I dried it completely by holding it around
>1" (2.5cm) above the electrical stove and started
>to dry it from reverse side firstly.
>-I etched the board using Ferric Chloride solution.



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