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Subject: Re: Etch resist Ink with Ink Jet printer Direct on PCB ?
Date: Fri, 13 Sep 2002 09:49:52 +0100
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On 12 Sep 2002 15:01:41 -0700, email@example.com (Bill Sloman)
>> Lot of mis-truths in this thread, how about the new Epson that prints
>> directly to CDs, the ink doesn't soak into the plastic! Secondly
>> earlier Epsons did have water soluable ink but my Epson Stylus Photo
>> (a few years old now) uses a non water based ink, leastwise when
>> printed on paper the print is water proof.
>Nice of you to add your own mis-truth to the thread. Epson inks have
>always been alcohol based. This didn't mean that the original inks
>were water-proof - they used to use alcohol soluble dyes to get the
>colours, including black, and these dyes were also soluble in water,
>whence non-water-proof. I understand that they went over to suspended
>pigments for black ink some time ago, and for the other colours more
>recently. I suspect they may have also changed the alcohol - the ink
>cartridges are now lasting longer.
>Bill Sloman, Nijmegen
OK I admit I guessed on the make up of the earlier inks, not having
the slightest knowledge of chemistry I guessed that as the output
disolved in water then it was water based. Thankfully I live and
So we now know that an Epson printer can print onto a copper clad
board, the question now is will the current ink resist attack by a
ferric chloride solution? Finally will a vigerous attack with wire
wool & water (or other 'safe' solution) remove the ink from the copper
such that it may be tinned?
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