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Subject: Re: Direct inkjet resist printing using MIS pigmented inks

From: "lcdpublishing" <lcdpublishing@...>
Date: 2006-04-29

This is starting to sound like bad news to me :-( It is odd that I
got the durabrite ink to hold up to etching and such by just
applying it to "stock fresh" copper. However, brushing these inks
is a world apart from having them sprayed on via the printer.

I sure hope you get some success soon, there are a handful of us out
here that have already got printers and/or ink waiting in hopes this
will work :-|

I have the MIS inks here but the printer is not ready yet. I might
still try a couple things later today. Perhaps I could put the ink
in an air brush or something and spray it on the PCB material for
testing ?

Chris



> FeCl acid bath, failure. First tried the method using a sponge
brush
> to wipe etchant across the PCB, ink wiped off in the hot etchant.
Used
> a baster to flush etchant across the rest of the board, even then
the
> ink dissolved off. Spots where ink had puddled were first to go,
> presumably they weren't completely dry. Lasting long enough to make
> slight impressions: Black, Magenta, and Yellow. Cleaned and
scrubbed
> board.
>
> Tried the pre-etch suggested by some for toner transfer. Reprint
> failure- ink bled outside the lines all over board. Cleaned and
> scrubbed board, dried in toaster oven for an hour. Board slightly
> orange due to oxidization. Got board hot just before feeding into
> printer. Back to square one, but this time I'm drying it in the
> toaster oven to try and get the ink truly dry.
>
> I'll upload more pictures tomorrow.
>
> Steve Greenfield
>