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.
18 BATES AND RUNYAN July
Table VII may be used as a guide for determining the required amounts of solid chemicals.
TABLE VII
Bleach, Specific Gravity Film Bleach No. 713
Original Specific Gravity 1 . 110
At 5 Per cent Dilution 1.104
At 10 Per cent Dilution 1 . 098
At 15 Per cent Dilution 1 . 093
At 20 Per cent Dilution 1 . 087
At 25 Per cent Dilution 1 .081
At 30 Per cent Dilution 1 .076
4. Fixing-Bath Control
No replenishment or rejuvenation is recommended for the No. 800 fixer. Electrolytic methods of silver recovery are difficult to apply to neutral or alkaline fixing baths. It is recommended that the No. 800 fixer be used until a silver concentration of about 2.5 grams per liter is reached or the time of clearing exceeds x/2 the total available fixing time. When this point is reached, the fixer solution should be replaced by a fresh bath. The used solution may be treated with sulfides to recover the silver.
III. SUMMAKY OF TESTING OPERATIONS RECOMMENDED FOR CONTROL OF COLOR-PROCESSING LABORATORY
A. Testing of Raw Materials
The recommended raw material tests are tabulated in Table VIII. The frequency of tests will, of course, depend principally on the supply situation, size of shipments received, and number of manufacturer's lot numbers involved. Emphasis should be placed on pretesting all lots of developing agents, sodium disulfite, and thiocyanate since variations in these chemicals are most likely to affect results. Less attention is required with the other chemicals once the consistency of a new source of supply has been ascertained. It is advisable to keep careful records of stock, date each chemical received, and date of its use for ready reference in tracking down variations in a solution mix.
A thorough pretesting policy will often prevent bad solution mixes and reduce the possibility of machine slowdown because of solution supply.