Vacuum packaging of UV printing technology release date: 2019 -
28 from the printing process, vacuum packaging UV printing ink fixation speed, conjunctival performance is good, for all kinds of substrates with good adhesion, and scratch resistance, wear resistance, acid, alkali and other properties are better than ordinary printing process, therefore, the vacuum packing bag offset UV printing technology is widely used.
Vacuum bags offset UV printing technology according to the state of substrates can be divided into sheet-fed offset printing and drum rotary offset printing paper, sheet-fed offset printing is suitable for plastic and aluminum foil material printing;
Rotary offset printing speed faster, suitable for mass printing.
Many fine products used for printing, UV curing can reduce the loss of small branches, increase matching color overprint of ink transfer rate.
When choosing ink, to comprehensively consider the effect of each component of UV ink, in order to ensure the good printing effect.
Due to the offset printing ink film is commonly 2 ~ 3 & mu;
M, although the light curing, but thin ink film, paint for the covering power of the printing will be affected by certain influence, therefore generally to improve the formulation of the pigment content;
Increased pigment content, ink film pervious to light performance decreases, go against the UV curing;
Thinner and ink film itself, if the poor wettability of pigments, pigments, fillers easily exposed to ink membrane surface, affect the ink film gloss, so want to choose good pigment dispersion.
Vacuum packaging UV printing technology considerations: (
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, etc.
In color printing, all kinds of pigment's capacity to absorb UV photons 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, enhance its curing effect.
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