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    • 9. 发明公开
    • Process for producing pre-press color proofs
    • Verfahren zur Herstellung vonFarbprüffolien。
    • EP0219560A1
    • 1987-04-29
    • EP85113258.9
    • 1985-10-18
    • Morgan, James Thomas
    • Morgan, James Thomas
    • G03F3/10
    • G03F3/107
    • A process is disclosed for preparing a pre-press proof of an original subject having highlight, midtone and shadow tone areas using a color print paper wherein the dyes of the print paper are brought into substantial color compliance with the yellow, cyan and magenta process inks to be used in producing a lithographic reproduction of the original subject. The tonal range of the proof image is also extended to closely match that of the final printed product. After determining the densitometer readings for yellow, magenta and cyan through blue, green and red filters respectively for the print paper and the process inks, the print paper is exposed to light through each filter with an appropriate color separation halftone negative over the film and with combinations of filters being used for hue correction of the yellow, magenta and cyan film dye coupling dyes. A masked short scale yellow separation halftone negative is used to prepare a dye transfer matrix thereof, the image defining portions of the matrix are dyed with a yellow transfer dye and the yellow is then transferred to the print paper sheet since the yellow coupling dye of the print paper has an excess of magenta and will not provide a true lemon-yellow color in the proof. Exposure of the print paper through color separation positives along with the same separation negatives through corresponding filters provides tone balance and allows compensation for dot gain in printing.
    • 公开了一种用于使用彩色打印纸来制作具有高光,中音和阴影色调区域的原始被摄体的预印刷证明的方法,其中打印纸的染料与黄色,青色和品红色处理油墨具有实质的颜色一致性 用于生产原始对象的光刻再现。 证明图像的色调范围也扩展到与最终印刷产品的音调范围非常相似。 在打印纸和工艺油墨分别用蓝色,绿色和红色滤色片确定黄色,品红色和青色的密度计读数后,打印纸通过每个过滤器曝光,并在膜上涂上适当的色彩分离半色调,并与 滤色片的组合用于黄色,品红色和青色染料偶联染料的色调校正。 使用掩蔽的短鳞黄色分离半色调负片来制备其染料转移基质,用黄色转移染料染色基质的图像限定部分,然后将黄色转印到印刷纸上,因为黄色偶联染料 的打印纸具有过多的洋红色,并且不会在证明中提供真正的柠檬黄色。 通过颜色分离阳性曝光打印纸以及相应的分离底片,通过相应的过滤器提供色调平衡,并允许补偿打印中的点增益。