Photographic Uses of Negative Color Materials.

Photomechanical color reproductions can be achieved in several ways using negative color materials. The method of making direct halftone positives is the shortest but has several disadvantages. The technique of reproduction from a continuous-tone color print made from the color negative is well known and requires little explanation. The method of making continuous-tone separation positives and halftone negatives has had little application outside of the ROP newspaper field. The extension of this technique using two-stage masks is described here in some detail. For those workers who prefer to screen negatives to halftone positives, some workable techniques are outlined.