Tinting and Toning
of
Eastman Positive
Motion Picture
Film
Price $2.50
Second Edition—Revised
Eastman Kodak Company
Rochester, N. Y.
1918
PREFACE
Owing to the difficulty of obtaining foreign made dyes, a revisionof the first edition of this publication has been made necessary.
As the result of an exhaustive series of tests of the products ofthe National Aniline & Chemical Company, Incorporated, New YorkCity, it is now possible to recommend a number of American madedyes suitable for the tinting of motion picture film, and those recommendedin this book are in most cases equal in every respect to thosepreviously obtained abroad.
To date, it has not been possible to obtain a thoroughly satisfactoryblue dye, film tinted with the Cine Blue recommended beingtoo red, especially before drying. A more suitable dye will no doubtbe available in due course.
The number of sample tints has been curtailed to twelve, andthese are given merely for guidance. It is intended that the variousformulas should be altered to suit individual requirements.
The chapter on toning has been thoroughly revised, a numberof tones having been eliminated and others substituted. The formulafor the copper tone has been improved, while the formulas forgreen tones requiring the use of vanadium chloride have been eliminatedin view of the expense and difficulty of obtaining satisfactoryvanadium chloride. With the samples at present on the market ithas not been possible to prepare a single-solution toning bath whichwould keep for any reasonable length of time.
Attention is drawn to the new method of dye toning[1] recentlyworked out in our Research Laboratory. This consists in first treatingthe film in the copper toning bath and then immersing the washedfilm in a solution of a basic dye, the dye attaching itself to the imageand leaving the gelatine clear. Although specific directions aregiven for obtaining five tones only by this method, as further dyesare available, those suitable for toning purposes will be published indue course.
The method of producing sulphide tones has been changed to oneof simple re-development with sodium sulphide, the addition of hypoto the sulphide solution having been eliminated. By commencingwith thin positive film of the correct density, and using a plainsolution of sodium sulphide for re-development, satisfactory transparenttones are obtainable with precision.
The formulas for the iron and uranium tones are the same asin the first edition.
EASTMAN KODAK COMPANY,
Rochester, N. Y.
August, 1918.
FOOTNOTES:
[1] The patent rights to this method are being secured by us, but it may befreely used for toning motion picture film manufactured by the EastmanKodak Company.
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Tinting and Toning of Eastman
Posit