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Explanation: O termo é 'screen'. Dic.Printing & Publishing, Peter Collin Publising: grid of dots or lines placed between the camera and the artwork, which has the effect of dividing the picture up into small dots, creating an image which can be used for printing; [traz + exemplos e definições].
Comparar com exemplo sobre 'retícula estocástica' (stochastic screen) em http://www.ece.rochester.edu/users/qiyu/Paper/SED/sed.html