Method for replenishing development replenisher in automatic...

Details Method for replenishing development replenisher in automatic... Method for replenishing development replenisher in automatic...

2007-03-13

2007-03-13

Rutledge, D. (Department: 2851)

Photography

Fluid-treating apparatus

Having testing, calibration, or indicating

C396S626000, C355S027000

Reexamination Certificate

active

11145978

ABSTRACT:
A method for replenishing a development replenisher in an automatic developing machine for a photosensitive lithographic printing plate precursor, wherein a value of an electric conductivity of a developer obtained by measuring an electric conductivity is compared with a reference value, and a development replenisher is replenished to the developer when the value of the developer is lower than the reference value, the method comprising: using a reference value of an electric conductivity optimal for a high resolution image as the reference value when developing a precursor having an exposed high resolution image in which an output datum of 50% area ratio is 210 lpi or more in terms of a peripheral length of an image area in an image unit that constitutes a gradation of a screen image: and changing the reference value to an ordinary reference value when developing a precursor not having a high resolution image.

REFERENCES:
patent: 4882246 (1989-11-01), Ohba et al.
patent: 6364544 (2002-04-01), Sasayama et al.
patent: 6866432 (2005-03-01), Sasayama
patent: 7024996 (2006-04-01), Sasayama
patent: 64-21451 (1989-01-01), None

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