2003 Volume 11 Issue 1 Pages 112-118
Thermal labels are used for the POS (point of sales) system of foods or other products. The specifications of POS labels are very severe, for such as temperature and humidity ranges, surface conditions against water, oil and chemical materials. It is required that the image density changes caused by these deterioration conditions be small. Akiyoshi and others have tried to optimize the thermal recording layer design, but the reproducibility was not satisfactory because of a small gain. In this report, trials were made in two areas: the use of the standard S/N ratio and change of the signal factor from energizing time to image density. As a result, a significant gain was obtained and good reproducibility was confirmed.
