Abstract

SynopsisThe rate of penetration of organic bright nickel deposits in the B.N.F. jet-test is shown to vary with the thickness of the deposit. Therefore, to determine thickness by this method it is necessary to use a calibration curve relating apparent and true thickness. Although minor variations in plating conditions have little effect, separate calibration curves are required for deposits from different proprietary solutions and there is some evidence that differences can arise between individual baths of nominally the same type. Unless the calibration can be checked on deposits from a given bath, it is therefore recommended that the jet test on organic bright nickel deposits be used primarily as an acceptance test of the “limit” type.

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