I have been silver plating copper sheets and getting a strange effect. I polish the copper to a mirror finish and clean it in an ultrasonic tank and proseed to plate it in a tank, the results produces a nice plate but afeter it is polished I quite often see striation lines inthe center of the plate. The line are not produced in the polishing prosses but apear to be in the metal. The copper is new sheet metal 16oz copper, in it's new state you can see fine striation lines ( are these caused by the rollers ) but when polished no sign remains until plated. The line usally show in the center of the plate with the outer area being well plated. I do not know if the copper is cold rolled or hot rolled would this make a difference ? Dose the size of anode have any effect on how even or thick the plating is, I currently have 2 pure silver coins about the size of silver dollars suspended in my two gallon tank while the 4x5 in plate hangs about 2 in away with voltage set between 1.8 and 2v.
Thanks, Mike
Thanks, Mike

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