Kodak Module 9 specifications Wash-Water Flow Rates, Stop Wash, Bleach Wash, Final Wash, Rewashing

Page 17

Wash-Water Flow Rates

Adequate washing in conjunction with conservation of wash water is a matter of concern for all processors. Ways of reducing wash-water usage while maintaining adequate washing include: (1) using multi-stage countercurrent-flow washes, (2) installing squeegees between wash stages as well as before the wash, and (3) shutting off wash water when the machine is not transporting film or leader. The last alternative can easily be accomplished by installing solenoid valves in the wash-water supply lines that are opened when the machine drive is running. The water saving from the use of squeegees and countercurrent stages can be substantial. A three-stage countercurrent final wash with squeegees before and after each stage requires approximately 1/25 of the water of a single-stage wash with entrance and exit squeegees. Overflow from one wash step should never be used in any other wash step.

Decreased water flow in the final wash may increase the propensity toward biological growth. See Module 2, Equipment and Procedures, for information on control of biological growth. Temperature control can also be a concern at lower flow rates. After establishing the final flow rate, check to be sure the process stays within the temperature tolerances specified in Tables 9-3,9-4,or 9-5.

The wash-water flow rates in Tables 9-3,9-4,and 9-5have been found to be satisfactory in a 165 ft/min (50 m/min) processor, using three-stage countercurrent bleach and final washes with efficient squeegees between stages. The other washes employ the use of two-stage countercurrent washes. The optimum wash rates for a particular installation can be determined only after the film transport rate, the number of countercurrent stages, and the squeegee efficiencies have been established. Experimentation is necessary to determine minimum wash-water flow rates that will provide adequate washing. Inadequate washing will result in significant contamination of the solution after the wash with the solution before the wash.

Stop Wash

An inadequate wash will result in a high level of Color Developing Agent CD-2 in the bleach or bleach accelerator.

Bleach Wash

If using the alternate cycle with ferricyanide bleach, an inefficient bleach will cause excessive buildup of bleach- fixer reaction products in the fixer. The combined levels of potassium ferricyanide and sodium ferrocyanide in the final stage of the bleach wash should be below 0.5 g/L, as measured by Analytical Methods ECP-00021/1and ECP- 2E-1101(or ECP-0023/01) in Module 3, Analytical Procedures.

Final Wash

The final wash must remove most of the thiosulfate (hypo) from the film. Retained hypo levels of 4 ∝g/cm2 or greater can cause serious dye fading. If the recommended three- stage countercurrent wash and wash rate are used, residual hypo in the designated films processed in Process ECP-2E should be barely detectable (0.2 to 0.4 ∝g/cm2) by Analytical Method ULM-0004/1in Module 3, Analytical Procedures.

Rewashing

For many years, the term rewashing referred to the common practice of running processed film through a complete process for a second time. This operation removes dirt and/ or heals slight emulsion scratches and digs. Rewashing a film once in the original process produces minimal changes in the dye stability and sensitometry. However, several rewashings may cause a change in density over the exposure scale of the film. By omitting the developer and bleach when the film is rewashed, changes in density can be minimized.

Rewash RW-1 is designed to avoid these sensitometric and dye stability changes, and at the same time, to produce similar emulsion swells to that obtained by going through the original developer.

Table 9-6 Rewash RW-1 Sequence

 

Step

Function

 

 

 

1.

Prebath PB-6

Swells the emulsion, causing the

 

 

scratches to be filled in and embedded

 

 

dirt particles to be released.

 

 

 

2.

Wash

Removes unwanted chemicals, which, if

 

 

left in, affect dye stability.

 

 

 

3.

Final Rinse FR-1

Contains a wetting agent to help prevent

 

 

water spots while the film is being dried.

 

 

 

4.

Dry

Dries film for subsequent handling.

 

 

 

The rewash machine consists of a loading elevator, tanks for the prebath, wash, and final rinse solutions, and a dryer. Submerged rollers and rack-drive assemblies will minimize spattering of solutions and aerial oxidation of sulfite in the prebath. Type 316 stainless steel is suitable for tanks, racks, and recirculation equipment. Use 10-micron filters of polypropylene, fiberglass, or bleached cotton in the recirculation system. Use no squeegees, except after the final rinse, where a high efficiency final squeegee is needed.

Process ECP-2E Specifications

9-15

Page 16 Page 18
Image 17
Page 16 Page 18
Contents Kodak Table of Contents Film Structure Films and Process SequenceDesignated Films Process ECP-2E Steps Other Film CharacteristicsAlternative Ferricyanide or UL Bleach Sequence Safelights for Darkroom IlluminationMachine Design Processing Machine Design and ConstructionNormal Room Light Dark Squeegee Exhaust Construction Materials Hastelloy C Plastics Austenitic Solution PolyvinylAisi Type Bleach Ferricyanide or ULCrossover Squeegees FiltersDryer Cabinet Film LubricationMechanical Specifications Operating SpecificationsMachine Exhaust and Room Ventilation Systems Countercurrent WashesTime Replenisher Recirculation R Process Steps Kodak FormulaFiltration F 100 ft .5 mFixer 35d 35dR 27 ± @ 40 to 60 L/min Wash†† 100 Tank TemperatureConversion to UL Bleach UL Bleach FormulationsSelecting a Bleach Formulation Controlling Bleach Tank Concentration with Replenisher RateChemical Supplies and Substitutions Drying SpecificationsTurbulation Specifications Stop Wash Wash-Water Flow RatesBleach Wash Final WashBulk Chemicals Processing Chemicals FormulasPackaged Chemicals Suppliers of Processing Chemicals H2SO4 Good mixing practices Solution MixingDeveloper SD-50 Formulas and Analytical SpecificationsDeveloper Alternate Developer SpecificationsStop Developer SD-51Bleach Persulfate Bleach AcceleratorAccelerator AB-1b AB-1bR Persulfate Bleach SR-30 SR-30RUL Bleach* or UL House Bleach Alternate Process BleachesFerricyanide Bleach SR-27 SR-27R Potassium UL BleachAlternate Process Fixer FixerFixer 35b 35-bR Fixer 35d 35dRFinal Rinse FR-2 FR-2R Final RinseSodium Fixer Sound Track Operating Specifications Storage of SolutionsOptical Sound Processing OverviewMore Information

Module 9 specifications

The Kodak Module 9 is a significant advancement in the world of imaging technology, specifically designed for professionals and enthusiasts seeking high-quality photo prints and efficient workflow solutions. As part of the Kodak line of products, the Module 9 offers a combination of cutting-edge technology and user-friendly features that cater to a diverse range of photographic needs.

One of the standout features of the Kodak Module 9 is its exceptional image quality. Leveraging advanced color science and innovative printing technologies, it produces vibrant and accurate color reproductions, ensuring that every detail of an image is captured and presented in its true form. This is particularly beneficial for photographers who require precise color representation, such as those working in fashion, product photography, or art reproduction.

The Kodak Module 9 is built with a high-performance print engine that supports various media types and sizes. This versatility allows for printing on everything from glossy photographic paper to fine art textures, enabling users to experiment with different materials to achieve their desired aesthetic. Additionally, the device is capable of producing large format prints, making it an ideal choice for those who need expansive visuals for exhibitions or displays.

Incorporating advanced connectivity options, the Module 9 ensures a seamless integration into modern workflows. It features Wi-Fi, USB, and Ethernet connectivity, which facilitates easy printing from multiple devices, whether it’s a camera, laptop, or mobile device. This flexibility is crucial for busy professionals who require quick turnaround times without compromising on quality.

One of the defining characteristics of the Kodak Module 9 is its user-friendly interface. The intuitive touchscreen display simplifies navigation, allowing users to easily adjust settings, select print modes, and monitor printing progress. This ease of use reduces the learning curve for new users, making it accessible to a wider audience.

In terms of sustainability, Kodak has incorporated environmentally friendly practices in the Module 9’s manufacturing and operation. The device supports energy-efficient modes and uses ink cartridges designed to minimize waste, aligning with the growing emphasis on sustainability in photography.

In conclusion, the Kodak Module 9 represents a forward-thinking solution in the photography and printing landscape. With its remarkable image quality, versatile media handling, robust connectivity, and user-oriented design, it stands out as a powerful tool for professionals aiming to elevate their imaging projects while maintaining an efficient and eco-friendly workflow.
Top Page Image Contents