Kodak Module 9 specifications Alternate Process Bleaches, UL Bleach* or UL House Bleach

Alternate Process Bleaches

Constituent	Fresh Tank	Fresh and Seasoned Tank	Fresh	Replenisher Analytical
		Analytical Specifications	Replenisher	Specifications
UL Bleach* or “UL House” Bleach*
Water 21-38°C (70-100°F)	700 mL		700 mL
Proxel GXL	0.07 mL		0.10 mL
Ammonium Hydroxide Solution (28%)†	54 mL		64 mL
KODAK Chelating Agent No. 1 (PDTA)	44.8 g		51 g
Ammonium Bromide (NH4Br) or	23.8 or 25 g	23.8 or 25 ± 3 g/L	30.7 or 32.3 g	30.7 or 32.3 ± 3 g/L
Sodium Bromide (NaBr)
Acetic Acid Solution (90%)	10 mL		14.5 mL
Ferric Nitrate (Nonahydrate)‡	53.8 g		61.2 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)		1.056 ± 0.003		1.066 ± 0.003
Total Iron		7.50 ± 0.50 g/L		8.20 ± 0.50 g/L
Ferric Iron		7.50 ± 0.50 g/L		8.20 ± 0.50 g/L
Ferrous Iron		<0.5 g/L		<0.5 g/L

*This formulation for bleach replenisher and tank can also be used as a “house” bleach for Process ECN and Process ECP. The rate of replenishment would be adjusted for each process to arrive at the appropriate tank concentrations for each constituent. The starting point replenishment rate recommendations for Process ECN and Process ECP are 200 mL/L and 400 mL/L respectively.

†You can substitute ammonium acetate for ammonium hydroxide and acetic acid. See Chemical Supplies and Substitutions .

‡ When using 35% solution by weight, use 70.5 g/L in Tank, and 80.2 g/L in Replenisher. § Adjust pH using glacial acetic acid, 7.0 N sulfuric acid, or 20% ammonium hydroxide.

Note:

•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 temporarily 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 deficiency of chelating agent.

•A pH correction can be made using sulfuric acid or ammonium hydroxide. Do not use phosphoric acid or strong bases such as potassium or sodium hydroxide.

•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.

Process ECP-2E Specifications 9-23