We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
588 CINEMATOGRAPHIC ANNUAL
POSITIVE DEVELOPER
Elon 7 ounces
Sodium Sulphite 30 lbs.
Hydroquinone 4 lbs.
Potassium Metabisulphite 1 lb.
Sodium Carbonate 15 lbs.
Potassium Bromide 10 ounces
Water to 150 gallons
Time of Development ;
For normal contrast, 3 Yz to 4 minutes at 65 °F.
INTENSIFIERS. SILVER CYANIDE INTENSIFIER. Especially suited for cartoon and title work where extreme contrast is desired.
Solution A.
Potassium Bromide 1 lb.
Bichloride of Mercury 1 lb.
Water 1 0 gallons
Solution B.
Pure Cyanide of Potassium 1 lb.
Nitrate of Silver 1 lb.
Water 1 0 gallons
Place the film in Solution A until the image has been bleached clear through to the back of the film, then rinse well and transfer to Solution B. One immersion gives a heavy degree of intensification, but if a greater degree is required, the operation may be repeated.
BOTH SOLUTIONS ARE HIGHLY POISONOUS. MERCURIC IODIDE INTENSIFIER. This formula has the faculty of reducing contrasts in addition to intensifying the general image. HIGHLY POISONOUS.
Water 1 0 0 gallons.
Sodium Sulphite (anhydrous) 83 lbs.
Iodide of mercury : S]4 lbs.
Immerse the film in this solution until the desired strength has been obtained. Then wash in running water for at least 1 5 minutes, place in the regular developer for 3 to 5 minutes. Then wash again for 30 minutes.
REDUCERS. PERSULPHATE REDUCER. Reduces the dense portions of negatives without materially changing the highlights or thinner portions of the image. Place film (wet) in solution No. 1 :
Ammonium Persulphate 33 ]4 lbs.
Water 100 gallons.
As soon as the right density has been obtained, place the film in the stop-bath, solution No. 2:
Sodium Sulphite 10 lbs.
Water . 1 00 gallons.
After this the film should be washed in running water for 15 to 20 minutes, then dried as usual.
FERRICHLORIDE REDUCER. Reduces high-lights faster than shadows, thereby overcoming extreme contrast.
Ferrichloride 1 dr.
Hydrochloric Acid .2 dr.
Water 1 0. ounces
Negative to be reduced must first be washed until all trace of hypo is removed. Then immerse in the reducer for a minute or so; on removal from this bath no action will be apparent, but on immersing the film in a freshly mixed hypo bath, reduction will take place very quickly. The operation should be watched carefully, and stopped a little short of completion, when the negative should be washed and dried as usual.