Linduch Security Ink

Ultraviolet fluorescent ink is a special printing one giving off visible light (400-800nm) whlle exposed to ultraviolet light ( 200-400nm). Ultraviolet light is divided into shortwave and long wave according to the excitation wave length .

The ink of excitation wave length of 254nm is called shortwave ultraviolet fluorescent ink and that of 365nm is long wave uItraviolet fluorescent Ink . It is divided into three kinds by colors: achromatic , chromatic and discoloration : Achromatic ink can glows red , yellow , green and blue colors ; chromatic ink can brighten the original color ; discoloratlon ink can change from a color to another color , which is applied in printing RMBnotes , bank books and taxation invoices.

One of the most widely used inks is invisible ultra violet and will be revealed when the print is placed under a black lamp (or UV light source). The ink is invisible to the eye (covert) under normal lighting conditions. When passed under a uv lamp the ink glows and is used predominantly for cheque printing and document protection. It is relatively cheap and is available in many colours. The ink must be applied to a UV dull substrate otherwise it will not be visible.

Water sensitive ink (wet sensitive ink), the surface color is white, after the water becomes transparent, revealing the background color, the ink can be print paper, plastic, fabric, leather and other substrates which have good adhesion and change effects, also fast changing, excellent covering ability.

Watermark inks can be printed in offset, letterpress and flexography; they are used for printing a watermark which will give a certain transparency on a paper, not exceeding 90gsm. As those inks are rather oily, it is advisable to print them on the back side of the paper and to avoid overprinting them.

The ink is mixed by night luminous powder, storage light thenglow for 12 hours continually by itself .This process (absorbing- storing-lighting) belongs to infinite loop, you can use it forever.

With features of no-toxic,no radioactive material and no fatalness,not only can be used for daily necessities safely, but also for decorating in architecture ,transport tool, military facility, fire emergency systems, traffic sign and so on.

Color Shifting Inks are used to print Secure documents, such as Driver’s License, Monetary Documents, Bonds, Checks, etc., by utilizing Flexographic, Intaglio, Silkscreen or Rotogravure printing methods.  These inks are formulated in Ultraviolet, Solvent-based and Oil-based systems.  These inks are available in a wide variety of colors.

Magnetic inks are mainly used for serialisation and numbering purposes. The ink contains small magnetic flakes and allows a number to be machine read. The most common application is cheque printing and you will find it on the MICR numbering portion of the bottom of a cheque. This will usually contain the cheque number, account number and sort code of the bank.

Use of nature butterflies, chameleons and other color principle,It is composed of nano-photonic crystals wrapped in microcapsules which are extremely difficult to develop, and its color changes under the action of an external magnetic field.

OVI’s contain minute flakes of metallic film. As the viewing angle is altered the colour morphs from one to another. This needs to be printed with a fairly heavy weight to get the best results. Such examples would be in currency printing and visa’s.

The most common colour changes are pink to green (and vice versa) as well as red to purple. You will also notice that the ink feels almost embossed on the substrate which is due to the amount of ink required to get the required effect.

Sunlight sensitive Ink are invisible inks which, gradually under exposure to Ultra-Violet rays, become coloured, in blue, or violet. This reaction of coloration is reversible, once the document is no more exposed to UV rays.

Invisible anti-counterfeiting ink tailored for high-speed inkjet printers, suitable for invisible bar codes, QR codes, and other digital encryption information anti-counterfeiting printing.Good concealment, traceability, difficult to forge.

The latest technology of invisible anti-counterfeiting ink, is also suitable for invisible bar codes, QR codes and other digital encryption information and other types of anti-counterfeiting printing.

Reversible temperature sensitive ink is composed of three kinds: discoloration, coloration and compensation ones. The original color of discoloration reversible temperature sensitive ink disappears after being heated and it can restore its original color after being cooled; Coloration reversible temperature sensitive ink is colorless in appearance but show colors after being heated and can restore colorless after being cooled; The original color of compensation reversible temperature sensitive ink can change into another one and it can restore its original color after being cooled.

Irreversible temperature sensitive ink is composed of two kinds: coloration and compensation ones. Coloration irreversible temperature sensitive ink is colorless in appearance but show colors after being heated and can not restore colorless after being cooled; The original color of compensation irreversible temperature sensitive ink change into another one and it can not restore its original color after being cooled; The temperature and color of ink can make to meet the specific require of customer.

Infrared excitation ink is an anti-counterfeiting ink developed by a special process with infrared luminescent materials added to the corresponding binder.Infrared excitation ink is a printing ink giving off visible light(red green and blue)when exposed to infrared light (940-1060nm).

With the features of high technology content,difficulty in copy and high anti-forgery capability,it can be applied in anti-forgery printing widely,especially in RMB notes.