Kodak CP-48S manual Prescriptions

The Black Patch monitors the performance of the developer for activity and contamination. There is no upper control limit for Black Patch. If the Black Patch plots are low, then it could be an indication of low developer activity due to underreplenishment or severe oxidation. If the blue Black Patch is very low and separated from the red and green plots, it could be a sign of developer contamination. See prescriptions listed under the LD parameter.

The HD-LD (Contrast) is usually a very steady plot parameter that is unresponsive to most process problems. However, it can help monitor developer activity problems due to agitation or oxidation. If developer tank solution is underagitated, the plots will be low. If developer tank solution is slightly oxidized, the plots will be high. If the developer becomes extremely oxidized, the plots will be low. If the solution is extremely out of control by more than 0.18density units over or under aim, drain and replace the developer tank solution. If the plots are less than 0.18 density units over or under aim, a prescription can be risked

Prescriptions:

—Underagitation: call service representative to fix agitation pump on processor.

—Oxidation: check for air bubbles in developer tank; call service technician if seen.

The LD (Speed) monitors the developer activity. Speed is the primary indicator of developer time, temperature, and especially developer replenishment rate. For time that is too long, temperature too high, or overreplenishment, the LD plots will be high. For time too short, temperature too low, or underreplenishment, the LD plots will be low. Check the temperature of the developer; adjust as necessary to bring back into specification. If the plots are extremely out of control, by more than 0.18 density units over or under aim, drain and replace the developer. If the plots are less than 0.18 density units from aim, a prescription can be risked.

Note: If the red LD is very high and/or the green LD is very low and they are split from the blue LD, it may be caused by developer contaminated with bleach-fix. In this case, the developer must be drained and replaced with fresh developer tank solution. Make sure the tank is cleaned and thoroughly flushed with water to remove all contaminated developer from the tank and circulation system.

Prescriptions:

— For high LD plots:

Overreplenishment: Remove a volume of developer solution equal to 10% of the total tank volume and replace with water. Repeat until it is in control.

— For low LD plots:

Underreplenishment: Remove a volume of developer tank solution equal to one third of the tank volume and replace with fresh developer tank that is mixed according to the “Make 1 litre” component ratios in Table 1a.

D-min (Stain) monitors the whiteness of the unexposed paper. An increase in the D-min plot can indicate oxidation or contamination problems in the developer, or a problem in the super rinse when the solution is dirty or has biological growth residue.

Prescriptions:

—For high D-minon paper caused by oxidized or contaminated developer, replace the developer tank solution with fresh developer tank solution mixed according to the component ratios in Table 1a.

—For a high D-minon the paper caused by dirty stabilizer or biological growth in the stabilizer tanks and racks, clean the stabilizer tanks and replace the solution with water and KODAK Rinse Tablets.

10 Using the KODAK EKTACOLOR Processing Cartridge 111 With Digital Minilabs, CP-48S/CP-49E CIS-229E