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January 1998

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Subject:
Re: Re[2]: [TN] Ammonia Etchant - Replenisher
From:
AHamil2719 <[log in to unmask]>
Reply To:
TechNet Mail Forum.
Date:
Thu, 22 Jan 1998 09:46:05 EST
Content-Type:
text/plain
Parts/Attachments:
text/plain (18 lines) 
Yes, the replenisher rinse does mix with the bulk etchant. Actually, the the
panels going through the etcher serve to increase the copper content. Left
unadjusted, this build-up will eventually cause the etchant to sludge, hence
the fresh etchant addition with a simultaneous pumping out of "spent" etchant
to maintain balance. The replenisher rinse serves also to keep the copper out
of your rinse water.

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