Screen printing ink on the substrates not firm fixation of reason and solution
(1) to the printing on substrates, it is very important to before printing substrate for strict degreasing and dealing with the inspection before.When the grease adhered on the surface of the substrates, binder, dust and other substances, can cause bad inks and substrates.Inadequate plastic products surface treatment before printing can also cause ink not firm fixation failure.
(2) as the substrates of polyethylene stocks, in order to improve and ink viscosity can when printed, must be flame treatment, metal material must be skimmed, dust removal process before printing, after printing should be dealt with in accordance with the requirements for ink drying temperature, if also can produce ink membrane drying improper handling stripped of failure.In addition, in order to make the textiles in textile printing waterproof, typically silicon processing, so that the printing is not likely to happen when the printing ink adhesion adverse phenomenon.
(3) items such as glass and ceramics, must carry on the high temperature sintering after printing, so as long as appropriate sintering temperature treatment will be good.Experimental ink film fixing fastness is good or bad of simple methods: when is print paper, you can read the printing surface repeated bending crease ink stripping, if the ink stripping, then its bond strength is weak.
In addition, the printed materials exposed to the rain, whether ink is easy to peel, it is also test the ink membrane fixing fastness of a method.
(4) bond is not enough ink itself causes the ink film not firm fixation, best to replace other kinds of printing ink to printing.Dilution solvent ink improper selection also can appear the phenomenon of not firm fixation, want to consider when choosing wedding solvent properties of ink, to avoid the phenomenon of inks and substrates felt rickety.
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