HD-LD Contrast, LD speed | Kodak FC1, FC2 instruction

HD-LD (Contrast):

This parameter monitors developer activity. Contrast is the primary indicator of developer agitation, oxidation, concentration, or contamination. If the developer tank solution is under-agitated, too dilute, or oxidized, the plots will be low. If the developer tank solution is over- concentrated or contaminated, the plots will be high. If the process is very out of control, i.e., by more than 0.15 density unit over or under aim, replace all of the developer tank solution. If the developer is contaminated, make sure you rinse the tank out thoroughly, and then replace all of the developer tank solution. If the plots are less than 0.15 density unit over or under aim, you can risk

aprescription.

Prescriptions:

• For high HD-LD plots:

Overconcentration: Dilute the developer with warm water in an amount equal to 5 percent of the volume in the developer tank. Repeat as necessary until the process is in control.

•For low HD-LD plots:

Under concentrated (Diluted): Replace developer tank with a tank mix of KODAK Negative Film FC Tank Developer, use mixing instructions on page 2.

Under agitation: Call a service representative to fix the agitation pump on the processor.

Oxidation: Check for air bubbles in the developer tank, and call a service technician if bubbles are visible. If oxidation is caused by low utilization, see the corrective action in KODAK Publication No. CIS-246, Operating Minilabs at Low Levels of Utilization. This publication is available on the Kodak website at www.kodak.com/go/photochemicals.

LD (speed):

This parameter monitors developer activity. Speed is the primary indicator of problems with developer time, temperature, and especially replenishment rate. For development time that is too long, temperature that is too high, or overreplenishment, the LD plots will be high. For time that is too short, temperature that is too low, or underreplenishment, the LD plots will be low. Check the developer time and temperature, and adjust them to specification. The developer time should be 3:05 ± 0:05; the temperature should be 38 ± 0.2˚C.

If the plots are very out of control, i.e., by more than

0.12density unit over or under aim, dump and replace all of the developer tank solution. If the plots are less than

0.12density over or under aim, you can risk a prescription.

Prescriptions:

• For high LD plots:

Overreplenishment: Replace a portion of the developer tank solution (5.2 litres) with one KODAK Negative Film FC Tank Developer Kit. Check the replenishment rate setting. Check the output of the developer replenisher pump and calibrate. Lower the developer replenishment rate by 10 percent or more if necessary.

• For low LD plots:

Underreplenishment: Replace a portion of the developer tank (5.2 litres) with one KODAK Negative Film FC Tank Developer Kit. Check the replenishment rate setting, and check the pump output of the developer replenisher pump and calibrate. Increase the developer replenishment rate by 10 percent or more if necessary.

6	Using the KODAK Negative Film Processing Cartridges FC1 and FC2 • CIS-254