Accelerator
Constituent | Fresh Tank | Fresh and Seasoned Tank | Fresh | Replenisher Analytical | |
Analytical Specifications | Replenisher | Specifications | |||
|
| ||||
|
|
|
|
| |
Accelerator * |
|
|
|
| |
Water 24- 38°C | 900 mL |
| 900 mL |
| |
Sodium Metabisulfite (Anhydrous) | 3.3 g | 2.0 ± 0.5 g/L† | 5.6 g | 3.3 ± 0.5 g/L† | |
Acetic Acid (Glacial) | 5.0 mL | 5.0 ± 0.5 mL/L‡ | 7.0 mL/L | 7.0 ± 0.5 m/L‡ | |
Persulfate Bleach Accelerator | 3.3 g | 3.3 ± 0.3 g/L | 4.9 g | 4.9 ± 0.3 g/L | |
or | or | or | or | or | |
KODAK liquid | 4.0 mL | 4.0 ± 0.4 mL/L | 5.9 mL | 5.9 ± 0.4 mL/L | |
(Ethylenedinitrilo) | 0.5 g |
| 0.7 g |
| |
Tetraacetic Acid Tetrasodium Salt |
|
| |||
|
|
|
| ||
Water to make | 1 L |
| 1 L |
| |
|
|
|
|
| |
pH at 25.0°C (77.0°F) |
| 4.0 ± 0.2 |
| 3. ± 0.2 | |
Specific Gravity at 25.0°C (77.0°F) |
| 1.007 ± 0.003 |
| 1.012 ± 0.003 | |
|
| 1.031 ± 0.003 |
|
| |
|
| (seasoned) |
|
| |
|
|
|
|
|
*Mixing the accelerator with high agitation for extended periods of time results in loss of some
until all chemicals are dissolved.
†The analytical method measures the total sulfite content of the solution and reports it as sodium metabisulfite (Na 2S2O5). If a solution addition to the sodium metabisulfite level must be made but sodium bisulfite is to be used, multiply the sodium metabisulfite addition weight by the factor 1.09 to obtain the equivalent amount of sodium bisulfite.
The difference between mix level and the analytical specification occurs because some sulfite is consumed in a reaction with KODAK Persulfate Bleach Accelerator
‡ The analytical method measures buffer capacity and results are reported in terms of glacial acetic acid. Adjustment in pH sho uld be made with glacial acetic acid or 50% sodium hydroxide.
§For convenience, add
To process VISION Premier Color Print Film, the accelerator replenisher flow rate may need to be increased. If only a small amount of footage is processed no change in the flow rate should be required in the replenisher. For larger quantities of VISION Premier Color Print Film (more than one tank turnover), it is recommended to increase the flow rate by approximately 20% and closely monitor the
Bleach
Persulfate Bleach
Only to be used in combination with accelerator solution.
Constituent | Fresh Tank | Fresh and Seasoned Tank | Fresh | Replenisher Analytical | |
Analytical Specifications | Replenisher | Specifications | |||
|
| ||||
|
|
|
|
| |
Persulfate Bleach |
|
|
|
| |
Water | 850 mL |
| 800 mL |
| |
Chlorine Scavenger * | 0.35 g |
| 0.50 g |
| |
Sodium Persulfate | 33 g | 30 ± 2 g/L | 52 g | 48 ± 3 g/L | |
Sodium Chloride | 15 g | 15 ± 3 g/L | 20 g | 20 ± 2 g/L | |
Sodium Dihydrogen Phosphate | 7.0 g |
| 10.0 g |
| |
(Anhydrous) |
|
| |||
|
|
|
| ||
Phosphoric Acid (85%) | 2.5 mL | 7.0 ± 1.0 mL/L† | 2.5 mL | 8.8 ± 1.0 mL/L† | |
Water to make | 1 L |
| 1 L |
| |
|
|
|
|
| |
pH at 25.0°C (77.0°F) |
| 2.3 ± 0.2 |
| 2.4 ± 0.2 | |
Specific Gravity at 25.0°C (77.0°F) |
| 1.037 ± 0.003 (fresh) |
| 1.059 ± 0.003 | |
|
| 1.085 (seasoned)‡ |
| ||
|
|
|
|
*Since there are many acceptable chlorine scavengers, convenience of use and cost may be factors in making a choice. Hydrolysate, a soluble version of gelatin, is available from U.S. Gelatin Corporation. Both food and
be dissolved in 40°C (104°F) water and stirred for 20 minutes. Up to 50 g/L can be added in this way in order to make a stock solution for subsequent use.
†The analytical method measures the buffer capacity of the bleach and reports the result as mL/L of phosphoric acid (85%). The analytical specification (7.0 mL) is larger than the amount of phosphoric acid added (2.5 mL) because dihydrogen phosphate (and sulfate in seasoned solutions) also contributes to the measurement. If a correction must be made, phosphoric acid (85%) can be added on a
‡If the bleach tank overflow is being reused, the specific gravity (a measure of sulfate ion buildup) should not exceed this v alue as incomplete bleaching could occur.
Process |