G - Physics – 03 – B
Patent
G - Physics
03
B
95/31, 95/0.4
G03B 27/32 (2006.01) G03B 27/54 (2006.01) G03B 27/73 (2006.01)
Patent
CA 1174093
ABSTRACT OF THE DISCLOSURE A process for the enlargement of a colour-balanced colour print by the additive method in which the colour filters disposed in the path of a beam of light from the lens of an enlarger are disposed below the lens in correction filtering, where they are alternately actuated and the times of exposure for obtaining colour-balanced prints are determined by means of a trial print which print is exposed by integrated light from the negative through the additive colour filters and a grey wedge and thereafter developed and evaluated, in which the trial print is exposed with a time of exposure determined by the operator and after having developed the trial print the field of the yellow, magenta and cyan wedges with a graduated darken- ing appearing thereon are compared to the coloured reference standards which are at least by 50% darker than the faintest colour shades recognized by eye, or a minimum density value 0.2 D and the times of exposure of the colour-balanced picture are determined by comparison.
386495
Marks & Clerk
Ofotert Optikai Finommechanikai Es Fotocikketet Ertekesito Valla
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