Procedure for determining coating rates

Details Procedure for determining coating rates Procedure for determining coating rates

G - Physics

01

N

358/12

G01N 23/223 (2006.01) G01B 15/02 (2006.01)

Patent

CA 1189638

ABSTRACT OF THE DISCLOSURE The invention provides a process for measuring the coating quantities contained in coating layers deposited on both sides of paper, cardboard or equivalent material in which both coating layers contain the same component emitting characteristic radiation. In the case most commonly encoun- tered, both coating layers consist of the same coating material. In the procedure two functionally mutually inde- pendent radiation source/detector pairs are used, between which the coated paper or equivalent is placed. Separately which each radiation source/detector pair excitation of fluorescent radiation in both coating layers under measure- ment is effected and measuring of the total intensity of the excited radiation present at the detector is effected. If the base weight of the paper or equivalent material is known, the coating rates are calculable from the results of measure- ment obtained. The said base weight is most advantageously measured before the coating step with the aid of a separate source of radiation and a transmission detector.

403859

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