Pay attention to the problem point when UVLED offset printin
Time:2016-04-11 15:09Source:sankunClick: Number
1、Different substrates should choose different ink, to comprehensively consider ink pervious to light quality, curing rate, ink on the surface of the cover and the print gloss.
2、In color printing, all kinds of pigment's capacity to absorb photons UVLED is different, its transmittance from high to low is M, Y, C, BK, so all kinds of printing ink curing degree is also different. Transmittance directly affect the excitation energy of the photon light initiator, so appropriate to row for BK color series, C, Y, M, the transmission of light poor ink absorption of photons as much as possible, strengthen its solidification.
3、Use of alcohol education version system can reduce the surface tension of the ink, promote the solidification, and in the process of printing, education version available liquid for plate oil area (blank) for strengthening processing, to ensure that the oil wet area full ink, hydrophilic area is not addressed.
Improve ink formulation and add the corresponding additives can increase the hydrophobicity of ink, but too much will lead to image edge ink hydrophobicity contraction, subtle level loss, outlet boundary is not clear and so on, affect the printing quality.
4、UVLED printing on paper surface strength is higher, surface strength is not prone to failure, hair, with gold and silver cardboard printing, because this kind of paper surface is smooth, less affinity on the ink, the second color dieyin the first color is easy to pull off. So in UVLED printing, should choose larger paper, surface tension and reasonable arrangement of color sequence, adjust the printing process in the related process parameters, in order to avoid and reduce the occurrence of the above phenomenon.
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