Method of coating multilayer photographic elements with reduced

Details Method of coating multilayer photographic elements with reduced Method of coating multilayer photographic elements with reduced

1992-04-14

1994-04-26

Beck, Shrive

Coating processes

Falling curtain of coating material utilized

118DIG4, B05D 130

Patent

active

053065271

ABSTRACT:
A method for reducing the tendency toward the formation of ripple imperfections in the coating of a plurality of layers of liquid photographic compositions or moving webs is disclosed. Conditions for coating the compositions are determined according to a given formula to keep the ripple value below 35. The coating compositions are formed into a laminar flow of a plurality of distinct layers including the photographic compositions as upper, middle, and lower layers. The flowing plurality of layers is then received as a layered mass on a moving web. A method for predicting the tendency toward the formation of ripple imperfections in the coating of a multilayer photographic element is also disclosed.

REFERENCES:
patent: 3973062 (1976-08-01), Fahrni
patent: 4384015 (1983-05-01), Koepke et al.
patent: 4415610 (1983-11-01), Choinski
patent: 4569863 (1986-02-01), Koepeke et al.
patent: 4572849 (1986-02-01), Koepke et al.

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