FILM CARTRIDGE AND METHOD TO PRODUCE LIGHT-LOCK FABRIC THEREFOR

摘要

A container for a strip (12) of light-sensitive material includes an elongat ed opening for withdrawing the material from the container. Strips (22) of light-locking material are provided on both sides of the opening, the strips being made from a napped a nd sheared woven fabric (12, 14). The fabric is dyed, dried, napped, sheared and heat s et prior to preparation of the strips. A method of producing such a light-locking materi al is taught which includes steps of passing the woven fabric multiple times through napping and shearing operations to increase the pile density.