| 摘要 |
In the present invention, a two-color printing operation is performed on a label with dichromatic color-forming temperature characteristic by controlling the current on-time to energize heating elements of a thermal head and thereby emphasizing specific information printed in a different particular color, wherein each horizontal line segment of the character pattern of such specific information transverse to the label feed direction is set to be thick in width, so that the horizontal line segment is subjected to a sufficient amount of thermal energy that covers several print lines and brings out the desired particular color, hence achieving emphatic print in the different particular color with certainty.
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