US2191502A

US2191502A - Multicolor film and process

Info

Publication number: US2191502A
Application number: US121904A
Authority: US
Inventors: Sease Virgil Bernard; Weber John Rau
Original assignee: Pont Film Mfg Company Du
Current assignee: DuPont Film Manufacturing Corp
Priority date: 1937-01-22
Filing date: 1937-01-22
Publication date: 1940-02-27
Anticipated expiration: 1957-02-27

Description

Feb. 27 1940. V B SEASE Er AL 2,l9l,502

MULTIGOLOR FILM AND PROGESS Fi1ed Jan 22 1937 |NVENTORS.

wmte nght Wh ch exposes the blue-Sensitive layer.

7. The mm is now deve10ped in a yenow col01' forning developer such as is given under "1)eveloper 3" in the preferred for1.

8. After wShing the silver deposits in the different layers are ren1oved by nleans of a' reducing agent such as Parmer's Reducer or by treat- Inent Wth cupric brnide, followed by a clearing b th of hyp0 and the nal wash Another modication of the present mvention is as follovs:

A nlm sinilar t0 that used in the preceding Inodiflcation is enlployed for the Illlt10010!' positive prints. In this In0dification, three colorseparation negatives 9!'( required. These Inay be Inade ether in a calnera or from a c010red transparency or fro!n a colored reflection print by renection copying. Positive prmts in black and white nlaybe nlade froIn these negatives or the negtives thelnselves Inay be reversed int0 positive records 'I'hree p0sitlve separation records are printed ont0 the Inultlayer iilIn previously described, in the preceding !nodifcation 'I'1e se quence 0f printing operations is not inlportant but the fol0vving serves as illustrative of a preferred procedure:

''1e blue recod positive is prillted by white or blue light onto the top layer.

(z)) 1ed record positive is printed by orange l'ed light, through the top layer onto the centra laye1'.

(c) ';I;'le green record positive is pTinted by green or White light, through the base onto the bottoT1 layer (d) I'he nlm is developed in an ordinary developer. such as the "flrst" deve10per of a reversal process and the nlln is processed to co10r by fol lowing through the steps two to eight inclusive als described in the preceding n0dication.

''he foregoing preferred enbodinents and nlodincations of the present invention are intended in illustration and not in 1nit9tlon there- 0f and all val'iations thereof are intended to be included vvithin the spirit and Scope 0f the ap pended clairns.

vve clain:

1. A photographic elenent conprising a transparent base having aat least tvv0 diTerentially sen sitized enlulsion layers superinlposed thereon, one of said layers being inposed directly upon the base and a. layer of pre-fogged Silver Salts'interp0sed between said emulsion layers 2- A photographic eletnent C0Inprising a transparent base having three dierentiauy Sensitized eInulsion latyers seupernpoSed thereon, one of said layers being imposed directly upon the base and au pref0gged Silver Salt layer between each of said enlu1sion layers.

3. A photographic eleInent conpriSing a t!'a!1sparent base having three emu1sion layers sensi tized red, green and blue, respective]y, super posed thereon, the red layer being imposed directly on Said base, a pre-f0gged silver Slt layer interposed between each of the e!l111si0n layers and a yellow 11tering layer p0sitioned in front of said red Sensitize(11ayer.

4- A photographic elenlent conlprising a. transparent base having th'ee enulsion layers Sensitized red, green and blue respectively, superposed thereon, the red layer being inlposed directly on said base, a pre-fogged Silver Salt layer interp0sed between each of the emulsion layers, said blue sensitized layer containing a yenow screenilg dye 5. A phot0graphic eleInent co!nprising a trans-