Methods for judging the performance of thermal sublimation transfer paper

1. Transfer rate: The transfer rate is the most basic and important performance of thermal sublimation transfer paper. The transfer rate mainly reflects the sublimation of thermal sublimation ink after transfer. A high transfer rate means that most of the thermal sublimation ink on the transfer paper is effectively sublimated. At present, there is no standardized detection method for transfer rate. Some companies currently test the transfer rate by transferring a specified ink block under standard transfer conditions and measuring the color chromaticity ratio on the transfer paper before and after transfer.

2. Back penetration: The back penetration phenomenon of thermal sublimation transfer paper refers to the phenomenon that the ink penetrates into the base paper through the coating. In most cases, the back penetration phenomenon is obvious, and the transfer rate of thermal sublimation transfer paper will decrease, resulting in poor transfer effect and other phenomena. At present, the back penetration of thermal sublimation transfer paper mainly relies on naked eye observation, and there is no standardized detection method to digitize it.

3. Drying speed: The drying speed of thermal sublimation transfer paper refers to the drying speed of the transfer paper after inkjet printing. Fast drying speed can not only speed up production efficiency by continuous printing, but also reduce the quality problems of printed materials caused by the ink not drying. There is no standard test method for drying speed. At present, the surface moisture meter method is usually used for detection and calculation.

4. Paper surface flatness: The flatness of the paper surface directly affects the printing production. Transfer paper with poor flatness is easy to cause friction with the inkjet head in digital inkjet printing, which not only affects the printing quality, but also easily causes damage to the nozzle, shortening the service life of the equipment.

5. Warping angle: The warping phenomenon is caused by the inconsistent expansion and contraction rate of the coating surface and the base paper surface, which will cause inconvenience in paper feeding of the printer, wrinkles when rolling up after printing, and misalignment of the transfer pattern, affecting the normal production progress. High-quality thermal sublimation transfer paper generally has a certain anti-warping performance, which reduces the adverse effects of warping on production.

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