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Common Problems and Solutions in Transfer Printing

date:2018-12-04 15:05
1. The liner material (cotton cloth, sponge, cardboard, etc.) under the flat heat transfer machine will absorb ink moisture in the process of transfer printing, which will cause excessive water vapor in the process of transfer printing, resulting in the fading of the pattern color on the transferred cloth or the occurrence of local air mist or water pattern interference. Therefore, hot pressing several times regularly before and during the process of transfer printing. Evaporation of moisture from liner cotton cloth can improve the situation. If conditions permit, dry liner materials should be replaced in time.
2. The printed pattern and the cloth to be transferred should not be damp as far as possible, otherwise, when transferring, especially the drum press, the paper will become soft and wrinkle easily, and the stripes will appear on the cloth when transferring. And the transfer rate will be lower, the color of the pattern is not bright, when serious, the edge of the pattern outline will melt. The color contrast between dry transfer and wet transfer will be color difference, and the more damp the more serious the situation is. As a result of the above factors, printed paper (to be transferred) and cloth should be kept in a dry room, humidity should be controlled below 60%.
3. Transfer paper transferring under flat press sometimes produces duplication. The reason is that the transfer paper is relatively flat when it is hot transferring. It will not bend immediately when it is heated under press, and the paper and cloth can be flat. When the hot press plate is lifted up, the paper will be absorbed on the upper press plate together with the fabric, and then drift down. When the high temperature transfer paper falls on the fabric, it will produce displacement and secondary transfer, forming a very light color shadow.
In order to avoid duplication, the following measures can be taken:
Reduce the rising speed. We can adjust the cylinder (or hydraulic cylinder) speed control valve (throttle valve or throttle valve) on the flat-plate heat transfer press, turn the valve that controls the lifting of the pressure plate down a little, so that the lifting speed of the pressure plate becomes slower, so that when the pressure plate is lifted, the paper and cloth can not be sucked together easily, so as to avoid falling off and secondary rotation. The problem of duplication in printing.
(2) Four corners dipping in water. If the transfer paper is smaller than the fabric, a little water (a little, < 0.5 square centimeter) can be applied on the four corners of the transfer paper without printing pattern, and then covered with the fabric for transfer. When the transfer paper is dipped in water, it will adhere to the fabric, and there will be no secondary transfer duplication after the transfer. After transfer, if there is burnt yellow on the fabric where some water is on, it can be erased with clear water.
Coverage method. If the transfer paper is larger than the fabric, it can cover the surface of the fabric, then the paper and the fabric will not be sucked up by the hot-pressed plate. This is because the physical reason for the suction is the static electricity of the fabric. When the paper covers the fabric, it cuts off the static electricity of the fabric, so it will not suck up and drop the second transfer.
Use special sticky transfer paper. In order to avoid duplication, the best way is to use special sticky transfer paper. When transferring, sticky transfer paper will be pasted with the fabric, so that no matter how the paper and the fabric are absorbed and dropped, the paper and the fabric will always stick together, thus eliminating the possibility of duplication caused by displacement. The use of sticky paper can greatly improve the operation. Convenience and the qualified rate of mass production.


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