How to test the quality of sublimation transfer paper?

With the continuous development of digital thermal transfer technology, sublimation transfer printing paper, as one of its main consumables, has become a hot spot in the textile printing and papermaking industries in recent years.

The quality requirements and performance testing of sublimation transfer printing paper can be started from the following aspects.

1. Image Print Quality：

   The overall appearance of the printed picture on the paper is referred to as image print quality. Good ink absorption of the printed image, uniform absorption, quick absorption of ink droplets, and the absence of visible ink buildup and image leakage after printing are requirements for sublimation transfer printing paper. Poor image printing quality will result in uneven and poor ink absorption from the coating, noticeable color bleeding, and more noticeable flaws on the printed image on the transfer product. Additionally, the transfer yield and continuous production speed are impacted if the paper cannot absorb ink rapidly, leading to a major issue of ink buildup and easily scratched or damaged printed images during the continuous manufacturing process..

Heat Transfer Efficiency Quality：

The picture is printed on the sublimation transfer paper when there is high heat transfer efficiency quality. After the heat transfer, the image should, under particular transfer circumstances, be transferred and transferred as fully as feasible onto the substrate. Complete, realistic, high color density, distinct color borders, absence of ghosting, and the least amount of ink left on the page are all desirable. Using the same inkjet printer and printing mode, the picture is printed on paper using this technique.  After transfer, the overall effect of the transferred product image and the amount of residual ink on the paper are used to judge whether the paper is good or not. Specifically, observe the overall effect of the transfer product (including color uniformity, clear boundaries between colors, etc.) and use a reflection densitometer to measure the CMYK color optical density value of the transfer product image after transfer and the light intensity of the residual image on the paper. represented by density. The overall effect of the transferred image is good, the average value of the sum of the optical density values of various colors is high, the average density value of the residual colors on the paper is low, and the amount of residual ink is small, and the quality of the paper is better.

1. Shape Stability：
   

   The deformation of the completed paper in an average indoor environment and the thermal stability in an environment with high temperatures (180-230°C) are the two primary definitions of shape stability. In the continuous transfer manufacturing process, the sublimation transfer paper cannot be fully and closely in touch with the substrate (such as fabric, etc.) if it is significantly distorted in a typical interior environment. This might impact the quality of the transfer and could result in transfer. ghosting of printed goods in images. Paper is weak, easily ages, and has poor stability in high temperature environments (180-230°C). Production is impacted by the transfer procedure' high risk of paper breakage.  The specific judging method is to judge the stability of the paper in the ordinary indoor environment by the degree of curling of the paper within a certain period of time under certain humidity and temperature conditions; the tensile strength and Tear strength to judge the stability of paper under high temperature environment.

https://www.jpl-print.com/