Processing Cycles

PROCESSING CYCLES FOR KODAK CHEMICALS

There are many different types of minilabs that operate with a variety of conditions. Kodak provides chemicals and processing cycles to give you quality results from your minilab regardless of its design. One of the processing cycles described in this publication should be right for your processor. Each cycle lists the best chemicals for you to use.

This section describes:

Processing cycles for KODAK FLEXICOLOR and EKTACOLOR Chemicals, including information on -

  • Time and temperature
  • Replenishment rates
  • Agitation
  • Filtration
  • Drying

Special procedures for your paper process-

  • Converting to KODAK EKTACOLOR PRIME Chemicals
  • Regenerating KODAK EKTACOLOR PRIME Developer
  • Converting to Process RA-4ECM

Film Processing Cycles

Kodak has three basic process cycles for processing color-negative films in minilabs. You can use any of the cycles with or without a wash step. Read the description of the three cycles to determine the cycle that best matches the sequence of processing steps and process times of your minilab. Use the cycles as guides; your processing cycle may vary slightly according to the design of your minilab.

The replenishment rates given for each cycle are for a typical mix of Kodak color-negative films in 135-24 size. Use the rates as starting points;

adjust them as required according to your control-plot results.

A description of each of the three cycles follows on pages 24 through 26.

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Film Processing Cycles

Process C-41 B Cycle

This is the cycle that is most commonly used in minilabs; most minilabs use the washless version. If your minilab uses a final wash, see the footnote.


Note: If your minilab uses a final wash, install a wash between the fixer and stabilizer with a wash time of 1:40, reduce the stabilizer time to 40 seconds, and use a replenishment rate of 35 mL/135-24 roll (32 mL/m). Use a wash-flow rate of 1,250 mL/135-24 roll (1,080 mL/m) for a two-stage countercurrent wash or 2,500 mL/35-24 roll (2,160 mL/m) for a single-stage wash.

-24-

Film Processing Cycles

Process C-41RA Cycle

This cycle is the shortest of the Process C-41 cycles. For this cycle, you must use KODAK FLEXICOLOR RA Bleach Replenisher NR and KODAK FLEXICOLOR RA Fixer and Replenisher. This cycle requires a special equipment design to allow for the short cycle, and the processor must provide higher agitation for the bleach, fixer, and stabilizer steps. Check with your minilab manufacturer to determine if the processor design meets the Process C-41 RA specifications.


____________________

*Use only FLEEXICOLOR RA Bleach Replenisher NR. Your equipment must provide the higher agitation required for this solution.

† Use only FLEXICOLOR RA Fixer and Replenisher. Use two countercurrent-flow fixer tanks with equal times in both tanks. Your equipment must provide the higher agitation required for this solution.

‡ Use three countercurrent-flow stabilizer tanks with equal times in all tanks. Your

equipment must provide the higher agitation required for this solution. If your processor has two countercurrent-flow stabilizer tanks followed by a single tank, replenish the second countercurrent tank at 40 mL/135-24 roll (36 mL/m) and the single tank at 20 mL/135-24 roll (18 mL/m).

-25-

Film Processing Cycles

Process C-41 Cycle

This is the process cycle most frequently used in older minilabs. It is most commonly used with a wash step. To use the washless version of this cycle, follow the recommendations in the first footnote.

_____________________

If your minilab uses a stabilizer step instead of a final wash, eliminate both washes; use three countercurrent-flow stabilizer tanks with equal times in all tanks; increase the stabilizer time to 2:20; use a stabilizer temperature of 38 ± 3°C (100 ± 5°F): and use a replenishment rate of 40 mL/135-24 roll (36 mL/m) for the stabilizer.

† If your fixer time is 6:30 or longer, you can use a temperature as low as 24°C (75°F).

‡ If your minilab uses a single-stage final wash, double the wash-flow rate.

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Film Processing Cycles

Processing Times-Times include immersion time plus crossover time to the next tank. The times for the bleach, fixer, and stabilizer are minimum times; you can use longer times for these solutions.

Replenishment Rates-The replenishment rates given are starling-point recommendations for a typical mix of Kodak color-negative films.

Developer-If needed, adjust the developer replenishment rate according to your control plots. Your developer replenishment rate depends on:

  • type of processor
  • amount of the various types of film processed
  • film exposure
  • other variables of the processing system

Bleach-To maintain chemical concentrations and pH level, the bleach replenishment rate must be high enough to compensate for developer carryover into the bleach. The bleach replenishment rate given is for typical carryover rates. If the carryover rate is higher, leuco-cyan dye and/or retained silver may occur. To offset the higher carryover, increase the replenishment rate. See your equipment manual for specifications and adjustments for squeegees or squeegee rollers.

Fixer-Use a replenishment rate of 35 mL7135-24 roll. The rate should be adequate to offset dilution from the carryover of the preceding bleach or wash.

Stabilizer-Use a replenishment rate of 40 mL/135-24 roll in a washless process and 35 mL7135-24 roll in processes that use a wash step.

Bleach Aeration-The bleach requires oxygen to return the exhausted bleaching agent to a usable form. Aeration provides oxygen by pumping air bubbles through the bleach. Not enough aeration can cause leuco-cyan dye and retained-silver problems, particularly with a diluted or underreplenished bleach.

-27-

Film Processing Cycles

Stabilizer-Use KODAK FLEXICOLOR Stabilizer and Replenisher LF in all types of minilabs. This stabilizer uses a non-formaldehyde stabilizing agent for safer handling, and to protect film dye stability It also contains a wetting agent to provide uniform drying.

Wash Rates-If your minilab uses a wash step, adjust the flow rate for the maximum film load and then operate at this rate. Do not use average rates. If your minilab has a wash between the bleach and the fixer, you can save water and energy by supplying the wash with the overflow from the final wash.

Filtration-Small amounts of insoluble materials in the water and solutions can stick to the film and minilab tank walls and rollers. This dirt can damage film. Install filters recommended by the manufacturer of your minilab to remove these materials. Usually, filters with a porosity of 10 to 30 microns are effective for solutions and wash water, and filters with a porosity of 15 microns are effective for incoming water supplies. You can use the following filter materials with processes that use FLEXICOLOR Chemicals:

  • bleached cotton
  • cellulose with phenolic resin binder
  • fiber glass with phenolic resin binder
  • polypropylene
  • spun polypropylene
  • viscose-activated carbon

Polypropylene is the most acceptable filter-core material and one of the least expensive. This material has no photographic effect, but the surfactants used to produce the polypropylene yarns may have an effect on your process. Therefore, monitor your process carefully when you first change filters. Replace filters regularly as part of routine maintenance.

Drying-Keep the film-drying area clean and free of dirt. If the dryer has a filter, check it regularly. Ideally, the drying temperature should not exceed 68°C (155°F). If the film has excessive curl, the ambient conditions are too dry; increase the relative humidity.

-28-

Paper Processing Cycles

Processing Cycles for KODAK EKTACOLOR Chemicals

With the introduction of KODAK EKTACOLOR PRIME Chemicals, the choice of chemical options for Process RA-4 is simplified. Most minilabs will be able to use EKTACOLOR PRIME Chemicals and realize cost savings and reductions in processing solution waste. If you are currently using KODAK EKTACOLOR RA Developer Replenisher or KODAK EKTACOLOR RA 100 Developer Replenisher, you will be able to use EKTACOLOR PRIME Chemicals. See the processing specifications given in the illustration for average utilization on page 31.

If your lab operates at low utilization (i.e., longer than 4 weeks for a developer tank turnover) or if your equipment has a roller-transport design, KODAK EKTACOLOR RA Developer Replenisher RT will provide better process performance. EKTACOLOR RA Developer Replenisher RT is specially formulated to compensate for the higher oxidation and evaporation that occur with low utilization and roller-transport processors.

If you use KODAK EKTAPRINT 2 Chemicals for Process EP-2, you can easily convert your paper processor to Process RA-4ECM. This process allows you to take advantage of the benefits of EKTACOLOR Chemicals, as well as the benefits of KODAK EKTACOLOR Papers designed for Process RA-4. See "Converting to Process RA-4ECM" on page 41.

Utilization-Depending on the number of rolls of film you process each week, your process utilization will be high or low. If your processor utilization is low, oxidation and evaporation will affect the activity of your processing solutions. Kodak manufactures processing chemicals that compensate for low utilization.

The simplest way to determine your processor utilization is to measure "tank turnovers" of your developer tank solution. A tank turnover is the point at which the volume of replenisher used is equal to the volume of the processor tank.

EKTACOLOR PRIME Chemicals are designed for minilabs that have an average utilization, i.e., a developer tank turnover occurs at least once every four weeks. If your paper processor consistently operates at low utilization-i.e., it takes longer than four weeks for a developer tank turnover to occur-you should use KODAK EKTACOLOR RA Developer Replenisher RT and EKTACOLOR RA Bleach-Fix and Replenisher. These chemicals contain more preservative and they are replenished at a higher rate to minimize the effects of low utilization.

-29-

Paper Processing Cycles

To help you determine the option that is suitable for your minilab, use the information in the following charts. To use these charts, you need to know the number of rolls of film or the number of prints you process each day; the charts include 3Ѕ x 5- and 4 x 6-inch print sizes.

Developer Options for Process RA-4 and RA-4ECM- Based on Processor Utilization*

3Ѕ x 5-inch prints/24 prints per order

4 x 6-inch prints/24 prints per order

Note: If you use EKTACOLOR PRIME Developer Replenisher, use EKTACOLOR PRIME Bleach-Fix Replenisher. If your processor operates at low utilization, you should use EKTACOLOR RA Developer Replenisher RT and EKTACOLOR RA Bleach-Fix and Replenisher.

If you are using Process RA-4ECM, you will probably need to use EKTACOLOR RA Developer Replenisher RT and EKTACOLOR RA Bleach-Fix and Replenisher because the large developer tank size of minilabs originally designed for Process EP-2 will significantly reduce your tank-turnover rate.

____________________________

*Utilization based on a 10-percent makeover rate and a 6-day work week.

-30-

Paper Processing Cycles

Process RA-4 Cycles

The Process RA-4 cycles are standard cycles for processing KODAK EKTACOLOR EDGE Paper and EKTACOLOR ROYAL II Paper. Use the cycle that is appropriate for your processor utilization.

Average Utilization-A developer tank turnover occurs at least once every 4 weeks.

Low Utilization-Longer than 4 weeks for a developer tank turnover.

__________________________________

*For 4 tanks; for the rates for 2 or 3 tanks, see the table on page 34.

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Paper Processing Cycles

Process RA-4ECM Cycles

If your minilab can't use the short process times required by Process RA-4, you can use Process RA-4ECM to convert to EKTACOLOR Chemicals and EKTACOLOR Papers designed for Process RA-4. Process RA-4ECM is an alternative process for minilabs that provides process-time flexibility by using different time/temperature combinations. Depending on your developer time, you can vary the developer temperature which allows you to use EKTACOLOR Chemicals.

To convert from Process EP-2 to Process RA-4ECM, follow the procedure described on page 41. Use one of the following cycles to process KODAK EKTACOLOR EDGE Paper and EKTACOLOR ROYAL II Paper.

Average Utilization-A developer tank turnover occurs at least once every 4 weeks.

_________________________

*For 4 tanks; for the rates for 2 or 3 tanks, see the table on page 34.

-32-

Paper Processing Cycles

Low Utilization-Longer than 4 weeks for a developer tank turnover.

_______________________________

*For 4 tanks; for the rates for 2 or 3 tanks, see the table on page 34.

Processing Times-Times include immersion time plus crossover time to the next tank. If possible, keep the crossover times to 6 seconds or less. The developer time range is 44 to 48 seconds. Minimum times for other solutions may be one second less than the normal times. Longer times for the bleach-fix and stabilizer reduce the benefit of a shorter process cycle, but otherwise are not harmful. If your minilab operates with a washless cycle, you can use a stabilizer time of 90 seconds if there are at least four temperature-controlled stabilizer tanks that have a recirculation rate of 0.67 to 1.0 tank volumes/minute. Divide the time equally between the tanks.

Replenishment Rates-Replenishment rates are given in millilitres per square metre and millilitres per square foot. To convert the rate to millilitres per minute, multiply the rate in mL/m2 by the processor speed in m2/min (or mL/ft2 by the processor speed in ft2/min). These rates are starting-point recommendations. Your replenishment rates will depend on:

  • type of processor
  • amount of paper processed
  • other variables of the processing system

-33-

Paper Processing Cycles
Number of Stabilizer Tanks
Stabilizer Replenishment Rate mL/m2 (mL/ft2)
2
970 (90)
3
495 (46)
4
248 (23)

Developer-If necessary, adjust the replenishment rate according to your control plots.

Bleach-Fix-The bleach-fix replenishment rates assume minimum carryover. If developer carryover is greater than normal, increase the bleach-fix replenishment rate to maintain the bleach-fix chemical balance and pH level. Otherwise problems, such as retained silver, may occur. See your equipment manual for specifications and adjustments for squeegees or squeegee rollers.

Stabilizer-The stabilizer replenishment rate depends on the number of counter-current-flow stabilizer tanks. See the recommendations in the table at the right.

Batch Replacement of Solutions-Instead of replenishing solutions, some minilabs use batch replacement. With batch replacement, you use solutions to exhaustion and then replace them. Check the manufacturer's recommendations for replacing solutions. Clean the tanks and racks thoroughly before you add fresh solution.

Wash Rates-If your minilab uses a final wash instead of a stabilizer, set the wash water flow rate according to the number of wash tanks and the amount of paper processed. To use the lowest wash rate, the minilab must have at least four countercurrent-flow wash tanks. Minilabs with fewer wash tanks require a higher wash rate. Unless the minilab automatically adjusts the wash rate for the size of the paper processed, set the rate for the maximum paper width.
Number of Final Wash Tanks
Final Wash Rate mL/m2 (mL/ft2)
1
See the note below.
2
6,460 to 10,800 (600 to 1,000)
3
4,300 to 10,800 (400 to 1,000)
4
2,150 to 10,800 (200to 1,000)

Note: If your minilab has only a single wash tank, use a wash rate of at least 10,800 mL/m2 (1,000 mL/ft2). You may need to make other processor changes to reduce or offset bleach-fix carryover because this rate may provide only a marginal safety factor.

-34-

Paper Processing Cycles

Agitation-Good agitation is important during the first few seconds of the developer and bleach-fix steps. If initial agitation is poor in the developer, development may be uneven. Poor initial agitation in the bleach-fix may not stop development uniformly. This can cause magenta streaks and non-uniformity in the prints. Excessive developer carryover into the bleach-fix can aggravate this problem.

Adjust your developer and bleach-fix recirculation rates to 0.50 to 0.75 tank volumes/minute and the stabilizer rate to 0.67 to 1.0 tank volumes/minute. With multiple tanks, the recirculation rate should be the same in each tank. Higher agitation may be necessary in low-volume and slow-transport speed processors to maintain photographic activity.

Filtration-Processing solutions and wash water may contain some insoluble materials. If these materials aren't filtered out, they can stick to the paper, tank walls, rollers, and lines, and possibly damage the paper. Use filters recommended by the manufacturer of your minilab and change them regularly as a part of routine maintenance. Usually, filters with a porosity of 10 to 30 microns are effective for solutions and wash water, and filters with a porosity of 15 microns are effective for incoming water supplies. For more information about filters, see page 28.

Drying-The maximum drying temperature for EKTACOLOR EDGE Paper and EKTACOLOR ROYAL II Paper is 96°C (205°F).

-35-

CREATE-A-PRINT 35 mm Enlargement Center

Processing in the KODAK CREATE-A-PRINT 35 mm Enlargement Center

The KODAK CREATE-A-PRINT 35 mm Enlargement Center uses a roller-transport processor. Roller-transport processors typically have relatively low utilization and higher rates of oxidation and evaporation than other types of processors. To compensate for these conditions, use EKTACOLOR RA Developer Replenisher RT and EKTACOLOR RA Bleach-Fix and Replenisher; these chemicals are specially formulated to compensate for the higher oxidation and evaporation that occur with roller-transport processing. For this processor, follow the steps and conditions given in the cycle for low utilization on page 31, and increase the replenishment rate for the stabilizer to 968 mL/m2 (90 mL/ft2).

Replenishment Rates - Use the following replenishment rates for the CREATE-A-PRINT 35 mm Enlargement Center.

  • The replenishment rate for EKTACOLOR RA Developer Replenisher RT is 215 mL/m2 (20 mL/ft2). However, because these processors typically have low-process activity that further decreases as the process seasons, you may need to increase the replenishment rate to 269 mL/m2 (25 mL/ft2).
  • The replenishment rate for EKTACOLOR RA Bleach-Fix and Replenisher is 215 mL/m2 (20 mL/ft2).
  • The replenishment rate for EKTACOLOR PRIME Stabilizer and Replenisher is 968 mL/m2 (90 mL/ft2).


-36-

Special Procedures

Special Procedures

This section includes procedures for-

  • Converting to EKTACOLOR PRIME Chemicals
  • Regenerating EKTACOLOR PRIME Developer
  • Converting to Process RA-4ECM

The two conversion procedures are one-time occasions. The regeneration procedure is an option for minilabs that use EKTACOLOR PRIME Developer.

Converting to KODAK EKTACOLOR PRIME Chemicals

Developer-You can convert to KODAK EKTACOLOR PRIME Developer Replenisher to significantly reduce some chemicals in the effluent. You can also regenerate EKTACOLOR PRIME Developer to further reduce your minilab's chemical discharge; see "Regenerating KODAK EKTACOLOR PRIME Developer." Depending on the developer you are currently using, follow one of the conversion procedures described below.

  • To convert to EKTACOLOR PRIME Developer Replenisher from KODAK EKTACOLOR RA 100 Developer Replenisher, no changes are necessary. Mix and use EKTACOLOR PRIME Developer Replenisher in place of EKTACOLOR RA 100 Developer Replenisher, and begin collecting developer overflow in a clean holding tank if you will regenerate your developer with KODAK EKTACOLOR PRIME Developer Regenerator.
  • To convert to EKTACOLOR PRIME Developer Replenisher from KODAK EKTACOLOR RA Developer Replenisher, follow the procedure given below. Verify that your process is in control before you begin the conversion.
  1. Remove from your developer tank at least 12 mL per litre of tank solution; save some of the solution for step 3.
  2. Add 12 mL of KODAK EKTACOLOR RA Developer Starter per litre of developer tank solution.
  3. "Top-off" the tank to the overflow with some of the developer tank solution that you removed in step 1.
  4. If you use Process RA-4, adjust the developer-tank solution temperature to 37.8 ± 0.3°C (100.0 ± 0.5°F).

If you use Process RA-4ECM, adjust the developer to the appropriate temperature for the development time you are using; see the table on page 42.

-37-

Converting to EKTACOLOR PRIME Chemicals

  1. Process a control strip to verify that the process activity level is similar to the activity level prior to conversion. If the LD is more than 0.06 above aim, add an additional 8 mL of EKTACOLOR RA Developer Starter per litre of developer tank solution.

Note: Following the conversion, you may need to make a minor printer adjustment for very critical printer balance.

  1. Mix and use EKTACOLOR PRIME Developer Replenisher in place of EKTACOLOR RA Developer Replenisher, and begin collecting developer overflow in a clean holding tank if you will regenerate your developer with KODAK EKTACOLOR PRIME Developer Regenerator.

Bleach-Fix-To convert to EKTACOLOR PRIME Bleach-Fix Replenisher from EKTACOLOR RA Bleach-Fix and Replenisher or EKTACOLOR RA 100 Bleach-Fix Replenisher, adjust your replenishment rate to 108 mL/m2 (10 mL/ft2), and begin using EKTACOLOR PRIME Bleach-Fix Replenisher. You do not have to dump and replace your current bleach-fix tank solution.

Stabilizer-To convert to EKTACOLOR PRIME Stabilizer and Replenisher from EKTACOLOR Stabilizer and Replenisher, no changes are necessary. Mix and use EKTACOLOR PRIME Stabilizer and Replenisher in place of EKTACOLOR Stabilizer and Replenisher. You can use EKTACOLOR PRIME Stabilizer and Replenisher and EKTACOLOR Stabilizer and Replenisher interchangeably.

-38-

Regenerating EKTAKOLOR PRIME Developer

Regenerating KODAK EKTACOLOR PRIME Developer

You can regenerate EKTACOLOR PRIME Developer by collecting developer tank overflow and mixing it with KODAK EKTACOLOR PRIME Developer Regenerator and water to prepare your next batch of replenisher; follow the procedure given below. EKTACOLOR PRIME Developer Regenerator is designed to minimize the volume of developer solution waste. Developer regeneration is simple and does not require special equipment; it allows you to reuse at least 60 percent of your original replenisher volume.

  1. Collect at least 6 litres of EKTACOLOR PRIME Developer overflow in a clean holding tank.
  2. Add EKTACOLOR PRIME Developer Regenerator to 6 litres of developer overflow; stir the solution after adding each part.
  3. Add enough water to make a total volume of 10 litres, and mix the solution thoroughly. It is not necessary to check the pH of this solution. You can begin using the solution to replenish your developer tank solution.

The illustrations on page 40 show two replenishment systems-the first system replenishes the tank solution without regeneration; the second system uses developer overflow for regeneration.

-39-

Regenerating EKTACOLOR PRIME Developer

Developer Replenishment without Regeneration

If you use 10 litres of replenisher with normal replenishment, approximately 2.7 litres of solution will be carried out by the paper into the next solution and 7.3 litres will overflow to the drain or collection tank for disposal.

Developer Replenishment with Regeneration*

If you start with 10 litres of replenisher in a system that allows you to regenerate and reuse your developer, you can collect 7.3 litres of developer overflow, and then mix 6 litres of the overflow solution with regenerator and water to make 10 litres of replenisher. Dispose the excess overflow solution (approximately 1.3 litres) in compliance with your local disposal regulations.

________________________________________

*Because you cannot prepare a fresh tank solution from EKTACOLOR PRIME Developer Regenerator, be sure to stock a supply of EKTACOLOR PRIME Developer Replenisher and EKTACOLOR RA Developer Starter, in case your tank solution becomes contaminated. Remember to avoid prolonged storage of back-up chemicals.

-40-

Converting to Process RA-4ECM

Converting to Process RA-4ECM

To convert from Process EP-2 to Process RA-4ECM, you will need to-

  • replace the chemicals
  • adjust the operating temperature for the developer time you choose
  • set new replenishment rates
  • set new process and printer aims

To make the conversion, follow the procedure given below.

  1. Drain the developer and stabilizer from your processor and replenisher tanks. You can use your existing bleach-fix solution by following the procedure in step 5. Dispose of the developer and stabilizer solutions in a manner that meets local and state regulations.
  2. Remove and clean all racks. Remove heavy deposits of tar; then wash and flush the entire system with hot water. Warm water will probably remove the tar, but you may need to use brushes and hot water to remove tar stains. You can use a cleaner, such as Lysol Toilet Bowl Cleaner,* to clean racks, tanks, and rollers. Do not use developer system cleaners. Possible contamination from residual developer system cleaner can create more of a problem than dirt from small amounts of tar or benzyl alcohol.
  3. Determine the solution volume of the minilab tanks from your manual or by making measurements.
  4. If your minilab uses a stabilizer instead of a wash, mix KODAK EKTACOLOR PRIME Stabilizer and Replenisher. Prepare an additional mix to fill your replenisher tank.
  5. You can convert to Process RA-4ECM without dumping your bleach-fix tank solution. Maintain a bleach-fix time of 84 seconds or longer with Process RA-4ECM until you use up your remaining inventory of KODAK EKTAPRINT 2 Bleach-Fix and Replenisher. When you have used the remaining EKTAPRINT 2 Bleach-Fix and Replenisher in your inventory, replenish the tank solution with EKTACOLOR PRIME Bleach-Fix Replenisher.
  6. If you drained your EKTAPRINT 2 Bleach-Fix tank solution in step 1, prepare a tank solution from EKTACOLOR PRIME Bleach-Fix Replenisher according to the mixing instructions.

___________________________________

*The active ingredients in this cleaner are hydrochloric acid and surfactants. Be sure to test any other cleaners before using them.

-41-

Converting to Process RA-4ECM

  1. Choose the developer replenisher that is best for your minilab's utilization (see page 30). Prepare a developer tank solution according to the mixing instructions or the instructions on the bottle of KODAK EKTACOLOR RA Developer Starter.
  2. Adjust the developer temperature to the appropriate temperature for the developer time of your minilab; see the following table. Set the bleach-fix and stabilizer temperatures to 30 to 36°C (86 to 97°F). Refer to your minilab manual for the adjustment procedure.

Time min:sec
Kodak EKTACOLOR Prime Developer Replenisher*
Temperature Formerly Used with KODAK EKTACOLOR RA Developer Replenisher or EKTACOLOR RA Developer Replenisher RT
Temperature °C(°F)
Temperature °C(°F)
Group 1
0:45
37.8 ±0.3 (100.0 ±0.5)
35.0 ±0.3 (95.0 ±0.5)
1:00
35.6 ±0.3 (96.0 ±0.5)
32.8 ±0.3 (91.0 ±0.5)
1:15
34.2 ±0.3 (93.5 ±0.5)
31.4 ±0.3 (88.5 ±0.5)
1:30
32.8 ±0.3 (91.0 ±0.5)
30.0 ± 0.3 (86.0 ± 0.5)
1:40
32.2 ± 0.3 (90.0 ± 0.5)
29.4 ± 0.3 (85.0 ± 0.5)
Group 2
1:40†
37.2 ±0.3 (99.0 ±0.5)
35.0 ±0.3 (95.0 ±0.5)
2:00†
36.1 ±0.3 (97.0 ±0.5)
34.0 ± 0.3 (93.0 ± 0.5)
2:30†
35.6 ±0.3 (96.0 ±0.5)
33.3 ±0.3 (92.0 ±0.5)
3:00†
34.2 ±0.3 (93.5 ±0.5)
32.0 ±0.3 (89.5 ±0.5)
3:30†
32.8 ±0.3 (91.0 ±0.5)
30.6 ± 0.3 (87.0 ± 0.5)

*The times and temperatures for KODAK EKTACOLOR RA 100 Developer Replenisher are the same as those for EKTACOLOR PRIME Developer Replenisher/

† Apply the Process RA-4ECM adjustment factors given in step 12 to determine aim values for your process.

  1. Prepare any additional replenishers needed.
  2. Turn on the minilab to recirculate the solutions and bring them up to temperature.
  3. Set your replenishment rates to the rates given for the appropriate Process RA-4ECM cycle. These rates are starting-point recommendations. Your replenishment rates will depend on the type of minilab, the paper processed, and utilization. Minilabs use a variety of methods to set and measure replenishment rates. See your minilab manual for more information.

-42-

Converting to Process RA-4ECM

  1. If you are using a time/temperature combination from Group 1 in the table in step 8, you do not need to adjust the reference-strip correction factors; proceed to step 14.

If you are using a time/temperature combination from Group 2 in the table in step 8, you need to apply Process RA-4ECM adjustment factors to the reference-strip correction factors.

There are 2 sets of Process RA-4ECM adjustment factors, depending on your developer time. For a developer time of 1:40, add the numbers in the table below to the reference-strip correction factors supplied with your control strips to obtain revised correction factors.
Process RA-4ECM Adjustment Factors for a Developer Time of 1:40 and a Temperature of 37.2°C (99.0°F)
Measurement
Red
Green
Blue
BP
+0.01
+0.10
+0.10
HD
+0.20
+0.24
+0.28
LD
+0.24
+0.24
+0.28
D-min (stain)
0
0
0

For developer times longer than 1:40, add the numbers given in the table below to the reference-strip correction factors supplied with your control strips to obtain revised correction factors.
Process RA-4ECM Adjustment Factors

for Developer Times of 2:00 to 3:30
Measurement
Red
Green
Blue
BP
+0.01
+0.10
+0.10
HD
+0.10
+0.20
+ 0.30
LD
+0.18
+0.24
+0.36
D-min (stain)
0
0
0

Note: The Process RA-4ECM adjustment factors compensate for the extended processing times; the printer adjustments in step 15 compensate for any density differences. Use the Process RA-4ECM adjustment factors each time you change control-strip code numbers. If you need help when you apply the adjustment factors in the U.S. and Canada, call the Kodak Customer Assistance Center at (800) 242-2424, extension 68.

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Converting to Process RA-4ECM

  1. Add the revised correction factors from step 12 to the red, green, and blue density readings of the reference strip packaged with the control strips. Record the values on the control chart; they are the aim values for Process RA-4ECM for this batch of control strips.
  2. When your minilab is at its normal operating temperature, process a control strip. Measure the control-strip densities, and plot the variations from aim on your control chart.
  3. Adjust the printer balance to match the current printer control aims.

-44-


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