Hello jhwm,

        Do you mean the wall of a plated through hole wall or the wall of a
particular plating tank?

        Copper plating - electroless or electrolytic?

        Who's chemistry?

        Hans

~~~~~~~~
Hans M. Hinners                                 WR-ALC/LYPME Bldg. 640
Materials Engineer                                      380 Second Street,
Suite 104
Manufacturing Eng. Sec.                         Robins AFB GA 31098-1638
912-926-1970 (Voice) 468 - 1970 (DSN)   912-926-7974 (Fax)
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> Technetters,
> My question is: What is the white substance adhering to the wall of the
> plating copper solution bath.
> Many thanks in advance...

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