Constituent

Fresh Tank

Fresh and Seasoned Tank

Fresh

Replenisher Analytical

Analytical Specifications

Replenisher

Specifications

 

 

 

 

 

 

 

Potassium “UL” Bleach

 

 

 

 

Water 21-38°C (70-100°F)

700 mL

 

700 mL

 

Proxel GXL

0.07 mL

 

0.07 mL

 

KOH (45%)*

 

 

84 mL

 

KODAK Chelating Agent No. 1 (PDTA)

54 g

 

60 g

 

KBr or NaBr

92 g or 78 g

92 g or 78 g

101 g or 86 g

101 g or 86 g

Acetic Acid

13.5 mL

 

15 mL

 

Ferric Nitrate (Nonahydrate)

63 g

 

70 g

 

Water to make

1 L

 

1 L

 

 

 

 

 

 

pH at 25.0°C (77.0°F)

 

5.30 ± 0.20

 

5.30 ± 0.20

Specific Gravity at 25.0°C (77.0°F)

 

1.131 ± 0.003

 

1.142 ± 0.003

Total Iron

 

9.0 ± 0.5 g/L

 

10 ± 0.5 g/L

Ferric Iron

 

9.0 ± 0.5 g/L

 

10 ± 0.5 g/L

Ferrous Iron

 

<0.5 g/L

 

<0.5 g/L

 

 

 

 

 

* DO NOT add more potassium hydroxide after ferric nitrate is added.

See Chemical Supplies and Substitutions for possible chemical alternatives.

‡ Adjust pH with glacial acetic acid, potassium carbonate, or 7.0 N sulfuric acid.

Note: See Chemical Supplies and Substitutions for calculations regarding raw chemical concentrations and alternatives.

It is especially important to follow the Good mixing practices: when preparing this bleach.

Follow exactly the mix order given above.

Check the solution pH before starting the ferric nitrate addition. It should be between 8 and 8.5; adjust if necessary.

Add the ferric nitrate solution slowly while mixing.

The solution should be clear and yellow after completion of the ferric nitrate addition and subsequent mixing. A temporary cloudy solution caused by too low a pH will clear during pH adjustment.

A solution which stays red for a long time after mixing indicates an excess of iron or a deficiency of chelating agent.

A pH correction can be made using sulfuric acid or potassium carbonate. Do not use phosphoric acid or strong bases such as potassium or sodium hydroxide after ferric nitrate addition.

When processing more than one tank turnover of VISION Premier Color Print Film, be sure to monitor the retained silver in the image area D-max.

Constituent

Fresh Tank

Fresh and Seasoned Tank

Fresh

Replenisher Analytical

Analytical Specifications

Replenisher

Specifications

 

 

 

 

 

 

 

Ferricyanide Bleach

(SR-27)

 

(SR-27R)

 

Water 32-43°C (90-110°F)

900 mL

 

900 mL

 

Potassium Ferricyanide (Anhydrous) *

30.0 g

30.0 ± 5.0 g/L

49.0 g

49.0 ± 2.0 g/L

Sodium Bromide (Anhydrous)

17.0 g

17.0 ± 2.0 g/L

26.0 g

26.0 ± 2.0 g/L

Water to make

1 L

 

1 L

 

 

 

 

 

 

pH at 25.0°C (77.0°F)

 

6.5 ± 0.5

 

8.0 ± 0.3

Specific Gravity at 25.0°C (77.0°F)

 

1.027 ± 0.003

 

1.043 ± 0.003

 

 

(fresh)

 

 

 

 

 

 

 

*One gram of this compound can also be obtained by mixing 0.41 gram of potassium persulfate and 1.47 grams of sodium ferrocyanide decahydrate. The reaction between potassium persulfate and sodium ferrocyanide takes about 1 hour, after which the final adjustments to the mix should be made.

Adjust to proper pH with 2.5 N sodium hydroxide of 2.5 N sulfuric acid.

When processing more than one tank turnover of VISION Premier Color Print Film, be sure to monitor the retained silver in the image area D-max.

9-24

Process ECP-2E Specifications

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Image 26
Kodak Module 9 specifications Potassium UL Bleach, Ferricyanide Bleach SR-27 SR-27R

Module 9 specifications

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