What is UV fluorescent ink for packaging boxes and what are the precautions for usefonmoo
UV fluorescent ink refers to the use of different wavelengths and energy of ultraviolet light under ultraviolet radiation, the monomer polymerization of the ink connecting material into a polymer, in the UV ink on top of the base plus the appropriate modulation of the ink, so that the printing in our (packaging box) on the color of the picture has a beautiful color (special circumstances outside), outstanding printability, suitable curing drying rate.
In the use of UV fluorescent ink also pay attention to some matters of use, UV fluorescent ink for paper and vinyl films and other printing, but its printing process to generally do not use letterpress printing, very suitable for screen printing and gravure printing, etc.. Paper printing, UV fluorescent ink is generally do the base color, otherwise it will be concealed by other inks, affecting the fluorescent effect.
A. What is UV fluorescent ink?
UV ink is the use of different wavelengths and energy of ultraviolet light under ultraviolet irradiation, so that the monomer polymerization of the ink linkage material into a polymer, on top of the base of the UV ink plus the appropriate agent to make the ink, with beautiful colors (special circumstances outside), outstanding printability, suitable curing drying rate. It is a kind of oil without solvent, fast drying speed, good gloss, bright colors, water resistance, solvent resistance, good wear resistance.
UV oil has become a more sophisticated ink technology, its pollutant emissions are almost zero at the same time there is outstanding adhesion, and has wear resistance, corrosion resistance, weather resistance and other characteristics. And UV fluorescent oil is in the UV oil on top of the base plus the appropriate conditioning.
Second, our packaging printing factory in the use of UV fluorescent ink when the need to pay attention to what?
1, UV fluorescent ink for paper and vinyl films and other printing. Because inorganic fluorescent matter is luminous by the crystal, if the pressure is too large can make the crystal rupture, so that the luminosity decreases, so generally do not use letterpress printing, but very suitable for screen printing and gravure printing.
2, UV fluorescent ink and general colored oil in the color match. Colorless fluorescent red oil printed in general oil, fluorescent effect is good; colorless fluorescent red oil printed in general blue or colorless fluorescent blue printed in general red role is poor, so the base color of the different shades, the fluorescent brightness also has a greater impact on the general ink the darker the base color, the worse the fluorescent effect.
3, UV fluorescent ink is not colorless or no trace, use to pay attention to. In the clean white paper, even if printed on completely transparent, colorless light oil, but also due to the paper and light oil refraction and reflection coefficients are different, visual differences occur, constituting a difference between the oil stain and the paper’s bright appearance.
4, paper printing, UV fluorescent oil in general is to do the base color, otherwise it will be concealed by other oil, affecting the fluorescent effect. Luminescent plastic printing, the situation is different, when the external printing fluorescent ink to do color, when the internal printing, do the first color.
5, UV fluorescent ink only under the following specific conditions to reduce the imprint: (1) the picture or text to change the color block to lines; (2), fluorescent ink printed on the part with the base color, which is conducive to cover the fluorescent oil ink; (3), should be selected for better absorption of paper, invoice special paper to absorb ink performance than copper plate and cardboard. (4), on the invisible role of special requirements of the print, can be the first printing colorless ink.
Third, what are the factors affecting the brightness of fluorescent ink?
1, printing paper elements. We should select securities paper or paper without fluorescent whitening agent, so that the fluorescence effect is more desirable, when printed on paper with whitening agent, fluorescence effect will be significantly weakened, in short, the more whitening agent content of paper, the weaker the fluorescence effect, and vice versa, the stronger, so you should try to select low whitening agent paper.
2, the thickness of the ink layer. The thinner the ink layer of the print, the weaker the fluorescence effect, the thicker the lining, the stronger the fluorescence effect, but at the same time, the more significant the print.
UV fluorescent ink in the use of these matters also need to pay attention to more than these, there are many needs for us to pay attention to, and constantly to find problems and improve our operating methods to reduce the emergence of printing problems. We also hope to communicate with you more, to develop the advantages and compensate for deficiencies.