Irreversible Photochromic Material. A material can change color when expose to uv light and the color won’t change back.   PHOTOCHROMIC MATERIAL Change color with UVA radiation.  THERMOCHROMIC MATERIAL Change color with temperature.  FRAGRANCE MICROCAPSULE MATERIAL Long lasting microcapsules release fragrance longer than six months.  LONG LASTING GLOW IN THE DARK MATERIAL Store light and heat from conventional sources, and glow in the dark.  INVISIBLE FLUORESCENT MATERIAL It is white or invisible under conventional visible light and appears colorful fluorescence under UV/IR light.

1 Introduction

Irreversible Thermochromic Ink is a water-based ink which only can change the color one time. The color is generated by the reaction of color forming agents (Leuco dye and color developer). The color forming agents do not react until a sensitizer melts and create enough vicinity between the color forming agents. We choose different melting point of the sensitizer to control which temperature to start the reaction.

2 Product Description

A. Color Convesion:

The color will change from near white to Magenta or black when Temperature reach specifc degree.

Colored as temperatures raise Colorless as temperatures cool down
Colored as temperatures raise Colorless as temperatures cool down
B. Available Activation Temperature:


C. Color: Black or Magenta.



3 Applications

A. Available Product & Applicability

○Applicable、×Not Applicable.

B. Irreversilbe Thermochromic Ink

a. Product Description:

It is water-based thermochromic ink for plastic films or absorbent paper and board substrates. When Temperature goes up to the setting point, the color will start to appear, and won’t turn back when Temperature goes down.

Pigment Content (%):29±2

Pigment Size (µm):95%< 10 microns

Solid Content (%):about 40%


Viscosity@25ºC:1700 ~3400cps

b. Properties:

It’s an ink suitable for silk screen printing.

c. Printing Parameters:

Recommended Mesh Size:120T/310 (European/US)

Minimum Mesh Size:150T/379

d. General Recommendtion:

Avoid the ink to sit dormant on the screen as this will cause ‘drying in’ on the screen and affect print definition and quality.

If you need to over print on a surface pre printed using offset inks it is recommended that the offset inks are wax free to reduce the risk of ink reticulation.

4 Additional Remark


Irreversible themochromic inks are inherently susceptible to damage by UV light.Were necessary a cover layer with UV absorber should be used to slow degradation caused by UV light.

They are only recommended for use in applications were there will be minimal exposure to UV light.

Were necessary a cover layer with UV absorber should be used to slow degradation caused by UV light.

5 Others

A. Storage and Expiratory date:

Keep sealed in a dark, cool place, and away from directly sunlight. Preferably store below 20ºC, but do not freeze.
Shelf Life of this ink is 6 months.

B. Certifications:

EN-71 and RoHS passed.

Update version date:20210217