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Dyeing Printing & Finishing

PH Pencil From SDL America

SDL America Inc., Charlotte, N.C., has introduced a pH pencil, for quick and easy determination of surface pH on wet or dry goods, yarns, or solutions, if a few drops are placed on a filter paper. A pencil mark on the substrate will change color according to the pH of the material. The mark can then be compared to a color chart, on which each color corresponds to a certain pH.

December 2000




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