Masking film

Details Masking film Masking film

1992-07-15

1994-11-29

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation modifying product or process of making

Screen other than for cathode-ray tube

430507, 430510, 430512, 428 40, 428333, 428412, 4284763, 428483, 428500, G03F 900

Patent

active

053689623

ABSTRACT:
A lightsafe masking film is disclosed which includes a transparent substrate, and a transparent, lightsafe layer peelably provided over the surface of the substrate and containing a light yellow colorant and a blue colorant so that the color of the lightsafe layer is light green. The spectral transmittance of the lightsafe layer does not exceeds 1% in the wavelength region of between 350 nm and L.sub.max, wherein L.sub.max is 420 nm or more, but exceeds 1% in the wavelength region of longer than L.sub.max with the maximum spectral transmittance of the lightsafe layer in the wavelength region of 500-570 nm being greater than 50%. The light green masking film is suitably used together with a conventional yellow or amber masking film for masking a photosensitive material in photomechanical reproduction process.

REFERENCES:
patent: 3619335 (1971-11-01), Bryan
patent: 3892900 (1975-07-01), Shima et al.
patent: 4923726 (1990-05-01), Maruyama et al.
patent: 4923727 (1990-05-01), Maruyama et al.
patent: 4925713 (1990-05-01), Kiryu et al.
patent: 4937116 (1990-06-01), Kizawa et al.
patent: 5009944 (1991-04-01), Maruyama et al.
patent: 5043198 (1991-08-01), Maruyama et al.
patent: 5085908 (1992-02-01), Sano et al.

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