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enrich the picture with pastel shades such as are found in nature. It helps to furnish detail and round out the picture.
Printing
All color record negatives are in sets of from two upwards. Therefore, the simplest form must use two records, separated in some manner. Aside from the "d" method described under "Positives" some suitable means must be found for bringing the records into register.
Most of the appliances are optical and those interested can look up the Brewster U. S. Patents and the Capstaff English patents for descriptions of their methods. Fox of Kinemacolor uses a still different optical form, which is virtually two printers, facing each other. One feeds the negatives two image areas while the other feeds the positives one image area, so that the records of one color follow each other in close sequence on the positive. The negative is illuminated and projected by a lens system to the positive. The same operation is followed for the second color. Prizma prints by contact, depending on the sprocket holes. Absolute registration must be had on the positives, for if this is not secured the pictures will not appear sharp and clear, even though the lack of registration is not otherwise objectionable.
Productions
Probably very little work has been done abroad during the past few years with color cinematography. In the United States several groups are busy with the problem and some have reached the market or have been given public showings.
Kinemacolor gave up its wheel screen showings and devoted itself to perfecting the Fox process, which is covered by description under "B" heading above.
Technicolor two-color taking process. Camera records two color value records of each exposure, simultaneously, but not adjacent through one lens. Rapid movement resulting in fringing is therefore eliminated. Public showings were on a special type of projector which superimposes two images on the curtain at one time. This process appears to be technically correct, but is not adapted to standard projection in its present form.
Cinechrome two-color taking, two adjacent images being recorded at each exposure. Projection by means of a special projector superimposing two images on the curtain at one time, eliminating fringing and pulsation. Very much the same as the Technicolor process.
Douglass two-color taking records being made singly in succession and projected in that way at high speed. Does not use color wheel, but dyes the red positive record red and the green-blue positive record green. Public showings in New York did not indicate any improvements over similar methods showing before its advent.
Kesda. Working on a method for producing a film that projects at sixteen pictures a second — standard.
Prizma. Double complementary pairs of images used in taking. One pair records the red-orange and blue-green values, the second pair records the orange and blue values. (See description under "Filters" for an added feature used in making the negatives.) Their new positions project at i6 pictures a second — standard.
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