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TINTING AND TONING MOTION PICTURE FILM 581
The temperature of this bath should not be higher than 75° F. (24°C)
Time of Washing after Mordantiny: Wash until the highlights are free from yellow stain, which usually takes from 10 to 15 minutes. Do not prolong the washing for more than 20 minutes, or some of the mordant will be washed out.
The Dye Bath
All the dyes used (except Methyl Violet and National Pink) are compounded according to the following formula:
Dye 1 ounce, 140 grains 40 grams
Acetic Acid (glacial) 3 % ounces 100 cc.
Water to 5 0 gallons 200 liters
Thoroughly dissolve the dye in hot water, filter into the tank, and fill up the tank with cold water.
With Methyl Violet, use one-fourth the quantity of dye called for in the above formula. With National Pink, use six times the quantity of dye called for in the above formula.
The following dyes are suitable for dye toning:
National Pink B Pink
Safranine A ___Red
Chry soidine 3 R Orange
Auramine Yellow
Victoria Green .Green
Methylene Blue BB Blue
Methyl Violet Violet
Time of Dye Toning: Immerse in the dye bath for from 2 to 15 minutes, according to the color desired. A short immersion gives a slightly colored image, and prolonged immersion gives a strongly colored image.
Modifying Dye-Toned Images
If over-dyed, some of the dye can be removed by immersing in an 0.2% solution of concentrated ammonia and rinsing before drying.
If after dyeing 10 minutes the image does not mordant sufficient dye, wash thoroughly, re-immerse in the mordanting bath, wash again, and then place in the dye bath.
Intermediate dye-tones may be obtained by immersion in successive dye baths, or by mixing of the dye solutions.
By omitting the ammonium alum from the Iron toning formula, the half-tones of the toned film are white and the shadows blue: if this film is then immersed in any of the basic dye solutions given above, the dye is mordanted to the half-tones, while the shadows remain more or less blue. The best type of positive for this purpose is one of medium density.
Time of Toning: Tone until the shadows are deep blue.
Time of Washing: Ten to fifteen minutes.
Time of Dyeing: Immerse in the dye-bath until the desired depth of color in the half-tones is obtained: this may be from five to fifteen minutes.