Test method for evaluating faults on printed sheets and webs

Details Test method for evaluating faults on printed sheets and webs Test method for evaluating faults on printed sheets and webs

G - Physics

01

N

340/123.4

G01N 21/01 (2006.01)

Patent

CA 1130410

ABSTRACT The specification discloses a control strip printed upon a printed product for the purpose of detecting faults comprising a plurality of individual test fields characterized in that four test fields are combined into one test block where one of the test fields is a full tone field and the other three are line screen test fields with different screen angularity. The use of the present control strip allows evaluation of the screen tone value in a print deducting the influence of slip and mackle from the four reflected values or screen tone values in the three line screen test fields.

374041

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