Thermal head adjusting method

Abstract

The improved thermal head adjusting method used when an image is recorded onto a thermal recording material by applying a voltage to a thermal head in accordance with image data, comprises the steps of measuring an initial state of at least one of characteristic values of the thermal head and adjusting the voltage to be applied in accordance with the image data with respect to a reference voltage. According to this method, variation in densities caused by difference of and variation in individual thermal heads can be greatly reduced and a high quality homogeneous thermal image can be stably recorded without being affected by difference of thermal heads.

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