New perspectives of various special inks in the printing process

Special inks, as the name implies, are special functions that can make the packaging or its contents have special functions of ink, such as improving the anti-counterfeiting function of the product, increasing the added value of the product or increasing the trust of the consumer.

The following is a detailed description of the application of several typical special inks, as well as some new special inks.

Temperature change ink

Temperature-changing ink refers to an ink whose color changes at a specific temperature and is classified into a reversible type and an irreversible type. For example, the reversible temperature-changing ink can be used on the label of the coffee package to determine whether the coffee is too hot or too cold by color change or information display, and can also be used on the package of the baby shower gel to indicate whether the temperature of the bath water is overheated. . Irreversible temperature change inks can be used to indicate whether a specific sterilization temperature is reached, or to indicate if the temperature of the product during transportation and storage is too low or too high. At present, more temperature-sensitive inks are used as reversible temperature-changing inks.

Fluorescent ink

Fluorescent inks can be used for product security or to enhance the appeal of images. Color fluorescent inks are visible under normal light, while fluorescent light produces fluorescence. Invisible fluorescent inks are barely visible under normal light, but emit fluorescence under UV light. UV/IR reactive inks react to both UV and IR. At infrared wavelengths of 980 nm, the ink emits bright green fluorescence and ultraviolet light exhibits another fluorescent effect.

UVitec offers fluorescent inks in a variety of color ranges such as yellow, orange, red, magenta, green, and cyan. In addition, a fluorescent pink color, as in the fifth color printing, to retouch the skin color in the printed image, expanding the range of tone of the magenta ink. These inks are used in flexographic printing, rotary screen printing, offset printing, and letterpress printing.

Alden & Ott Printing Ink's Starlight fluorescent inks give printers more choice and flexibility in printing speed and color strength. These inks are thermally transferable and offer traditional color samples as well as Pantone color samples.

Fluorescent inks can also be applied to trinkets, running shoes, wallpapers (indicated in dark aisles). Like other specialty inks, fluorescent inks can also affect printing speed in printing, and often achieve high coverage. Screen printing is used.

Metal ink

Metallic inks can create a dazzling effect on the product packaging on the shelves. Water Ink Technologies' WATER BRIGHT metallic inks provide good metallic luster and excellent printability.

Alden & Ott Printing Ink's Meterorite metallic inks are designed for narrow-width flexographic printing and support high-quality overprints due to the use of very small metal particles. Meterorite series metal inks use a high number of screen anilox rolls to achieve better ink coverage.

Metallic inks can also be used as a more economical alternative to aluminum foil. When the area of ​​the aluminum foil on the package is less than 25%, it is more cost-effective to use metal ink instead of aluminum foil.

Environmental Ink Coatings offers several different metal inks: the Aqua Gloss series of metallic inks offer the best resistance to abrasion; the Aqua Sparkle range has a bright finish and high stability.

Eckart's Ultra Star metal inks achieve the same printing results as aluminum foil.

Sun Chemical has signed an agreement with MetalFX Technologies in the UK to become the official ink manufacturer for MetalFX and a supplier of metallic inks for ink packaging for paper, flexible , rigid and commercial printing . The MetalFX solution can be used. A metal effect is achieved on the package. MetalFX uses the transparency of CMYK four-color inks to superimpose CMYK four colors on MetalFXBase silver inks, enabling thousands of print colors, and controlling color through MetalFX software and color samples. Silver ink is specially designed to have good adhesion to the upper CMYK ink. According to MetalFX's process, silver ink is first printed, and then standard CMYK ink is overprinted to produce up to 615 metallic colors in a common four-color print.

Other special inks

Two-color inks (color transfer), glitter inks, pearlescent inks, expansion inks, and stereo inks are now of interest to the market.

Rad-cure offers UV and waterborne two-color inks for flexographic printing for paper and most plastic films. When viewed from a different angle, the ink is converted from a white color to another color. Two-color inks enhance the appeal and anti-counterfeiting features of the product. In addition, the effect of this ink to change color cannot be captured by a copier or scanner.

Flash inks enhance the visual appeal of labels, cartons, POP displays, and stickers. Rad-cure's RAD-KROME series of UV and water-based flash inks and pearlescent inks can be used for flexographic and screen printing.

In order to improve the visual effect of different inks, UVitec has produced a rotary screen printing UV flash coating that can be applied on-line to improve the ink effect.

Siegwerk Ink's phosphorescent inks can continue to illuminate after the light source is turned off. This ink can be used in products such as labels and toys, and can be done by gravure and screen printing.

Flint Ink has developed an ink system called the HolographINK Process that prints eye-catching holographic effects without the use of expensive holographic materials, producing countless holographic colors and patterns on the substrate. Create beautiful details and accurate positioning. Can be used in the decoration, brand recognition, security and anti-counterfeiting areas of products. High adhesion strength can be achieved on a variety of substrates, such as PE, PP and PVC.

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