Process verification in photographic processes

摘要

PCT No. PCT/EP95/00837 Sec. 371 Date Jun. 27, 1996 Sec. 102(e) Date Jun. 27, 1996 PCT Filed Mar. 7, 1995 PCT Pub. No. WO95/24673 PCT Pub. Date Sep. 14, 1995The present invention relates to the use of multivariate statistical process control as a means of process verification in photographic processes. The method of the present invention allows the process to be controlled in a simple and effective manner by deriving T2 for a series of variables which impact the material performance characteristics and comparing this value of T2 with a standard value for the particular system. The contributions of scores to T2 are used to interrogate changes in monitored process variables and to improve efficacy in maintaining and regaining the system in process control