APPARATUS FOR MEASURING DEVELOPING CONSTITUTION DENSITY OF WET PRINTER

摘要

PURPOSE: A developing solution density measuring apparatus of a wet printer is provided to exactly measure a density of a developing solution, by obtaining a temperature information of the developing solution. CONSTITUTION: A developing solution flows in and out through a vessel(32). A rotating roller(143) is rotatably installed in the vessel(32) and forms an oil film on the developing solution which is received in the vessel(32). A roller driver(180) drives the rotating roller(143). Light emitting sections(151,152) scan predetermined amount of a light on a surface of the rotating roller(143). A light receiving section(160) outputs a signal which responds to light receiving amount. A temperature detector(190) detects a temperature of the developing solution which is received in the vessel(32). A density measuring means measures a density of the developing solution based on the temperature from the temperature detector(190) and the signal from the light receiving section(160).