UV colorless fluorescent ink, also known as invisible colorless fluorescent ink, it and the temperature change ink (also known as thermal ink), optical color ink, metal color ink, anti-alteration ink, mirror color ink and other components together constitute the current domestic security ink. Among them, fluorescent ink is widely accepted because of its mature technology, stable quality, complete varieties and various printing methods. Under normal light source, the ink becomes colorless, transparent or nearly white, printed on paper or plastic film with no visible color, and shows different colors under ultraviolet light, mainly including: red, yellow, green, white, orange, purple and other colors . The company produces colorless fluorescent series inks suitable for various materials (such as paper, plastic film, metal, glass, rubber, etc.), suitable for a variety of printing methods: offset printing, letterpress printing, silk screen printing, gravure printing, etc., but the same ink Due to the differences in printing, security design, and paper selection, the ink imprinting and fluorescence effects will be very different. Use the following points should be noted:
1, before use, must completely wash ink roller, ink tank, printing plate and other related parts, so as not to mix with other colors. It is advisable for a conditional printer to leave special equipment and replace it with a new ink roller.
2. Color matching of UV colorless fluorescent ink and ordinary colored ink. Colorless fluorescent red ink printing ordinary ink, the best fluorescent effect; colorless fluorescent red ink printing ordinary blue ink or colorless fluorescent blue printing ordinary red ink is poor, so the depth of the background is different, have a greater impact on the fluorescence brightness The darker the ink, the worse the fluorescent effect.
3, printing paper, UV colorless fluorescent ink is generally the final background, otherwise it will be covered by other inks, affecting the fluorescence effect. When the transparent plastic is printed, the situation is different. The fluorescent ink is the final color when printing on the outside, and the first color when printing on the inside.
4, UV colorless fluorescent ink is not absolutely colorless or absolutely no trace. On plain paper, even if it is printed with a completely transparent, colorless varnish, the difference in refractive index and reflectance of paper and varnish will produce visual differences, resulting in a difference between the grease and the surface of the paper.
5, UV colorless fluorescent ink can only reduce the print under the following specific conditions: (1), pattern or text to change the color of the line; (2), fluorescent ink is best printed on the background color, is conducive to cover the fluorescence Ink traces; (3) Papers with good absorbability should be selected. Ink-printing papers absorb inks better than copper plates and paperboards. (4) For printing products that have special requirements for invisible effects, the first printing colorless ink can be used.
6, factors that affect the fluorescence brightness: (1) paper factors. Should choose security paper or non-fluorescent whitening agent paper, so that the fluorescent effect is more ideal, when the brightener printing paper, the fluorescence effect will be significantly reduced, in short paper more brightener content, the weaker the fluorescent effect The contrary, the stronger, so paper should be selected as low brighteners as possible. (2) Ink layer thickness. The thinner the printed ink layer, the weaker the fluorescent effect. The thicker the ink layer, the stronger the fluorescent effect, but the more obvious the print is.
When users use UV fluorescent inks, if they can pay attention to these characteristics, they will surely achieve good printing and anti-counterfeiting effects.
1, before use, must completely wash ink roller, ink tank, printing plate and other related parts, so as not to mix with other colors. It is advisable for a conditional printer to leave special equipment and replace it with a new ink roller.
2. Color matching of UV colorless fluorescent ink and ordinary colored ink. Colorless fluorescent red ink printing ordinary ink, the best fluorescent effect; colorless fluorescent red ink printing ordinary blue ink or colorless fluorescent blue printing ordinary red ink is poor, so the depth of the background is different, have a greater impact on the fluorescence brightness The darker the ink, the worse the fluorescent effect.
3, printing paper, UV colorless fluorescent ink is generally the final background, otherwise it will be covered by other inks, affecting the fluorescence effect. When the transparent plastic is printed, the situation is different. The fluorescent ink is the final color when printing on the outside, and the first color when printing on the inside.
4, UV colorless fluorescent ink is not absolutely colorless or absolutely no trace. On plain paper, even if it is printed with a completely transparent, colorless varnish, the difference in refractive index and reflectance of paper and varnish will produce visual differences, resulting in a difference between the grease and the surface of the paper.
5, UV colorless fluorescent ink can only reduce the print under the following specific conditions: (1), pattern or text to change the color of the line; (2), fluorescent ink is best printed on the background color, is conducive to cover the fluorescence Ink traces; (3) Papers with good absorbability should be selected. Ink-printing papers absorb inks better than copper plates and paperboards. (4) For printing products that have special requirements for invisible effects, the first printing colorless ink can be used.
6, factors that affect the fluorescence brightness: (1) paper factors. Should choose security paper or non-fluorescent whitening agent paper, so that the fluorescent effect is more ideal, when the brightener printing paper, the fluorescence effect will be significantly reduced, in short paper more brightener content, the weaker the fluorescent effect The contrary, the stronger, so paper should be selected as low brighteners as possible. (2) Ink layer thickness. The thinner the printed ink layer, the weaker the fluorescent effect. The thicker the ink layer, the stronger the fluorescent effect, but the more obvious the print is.
When users use UV fluorescent inks, if they can pay attention to these characteristics, they will surely achieve good printing and anti-counterfeiting effects.
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