Description of Kodak Films
Kodak offered films that were generally used for photogravure positives and separations.
The original Gravurue positive film 4135 was manufactured specifically for photogravure.This film was dropped by Kodak and it moved to commercial film 4127. It also was taken out of production.
The last of these blue sensitive films was professional Copy Film 4125. Its curve was at a higher contrast intended for copying photographs and retaining tonal range. After the end of 4125, printers used orthochromatic films and exotic developer cocktails to make them behave like a continuous tone film.