Check if the ink is peeled off after printing, use these three methods
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When printing pvc film, how to check that the ink does not fall off after printing? This paper summarizes the three methods of tape method, engraving test and sticking page test for reference.
1, tape method
Cut the scotch tape into an appropriate length and close it to the film surface after drying. The first half slowly and the second half quickly peel off the tape, and observe the amount of ink transferred to the tape. It can be inferred that the adhesion of the ink is How big. If the ink falls off the well-treated film surface, the composition of the ink is not suitable.
2, engraving test
The printed matter is placed flat on a flat hard surface and scored with a sharp needle. As long as the ink and the film are completely adhered, the ink surface will not fall off due to scoring.
3, sticky page test
The printed film is taken up and tested for the degree of sticking of the inner layer. As long as the treatment is perfect, it is entirely possible that the adhesive page is not adhered. In addition, a wetting method can be used to determine the contact angle of the polyethylene and the droplets.