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B. N. Mehra and Co.,Delhi

Photochromic Dyes & Thermochromic Pigments

We offer a wide range of photochromatic dyes and thermochromic pigments to our customers. These are light and heat sensitive dyes & pigments, which have got different features and applications such as :

Photochromic Dyes

These dyes are mainly used in ophthalmic lenses. Apart from this, they have application in :
  • Children's toys
  • Agricultural films
  • Novelties
  • Packaging
  • Security markers
  • Clothing
  • Cosmetics

Thermochromic Pigments

These pigments have the ability to change color or get discolored on contact with heat. We offer a brightly colored range of pigments in this category, which comes to their original color when the heat source is removed. Our pigments can be easily incorporated into printing inks, plastics and coatings. Apart from this, they are mainly used in creating novelty effects as well as in temperature safety indicators.
Photochromic Dyes

Photochromic Dyes


Photochromic dyes are sensitive to UV light or sunlight and impart special colour effects to a range of end user products.

When correctly formulated, the products are colourless until exposed to sufficient UV light or sunlight. On exposure, they become brightly coloured and then fade back to colourless once they are removed from the source of irradiation.

We offer the most comprehensive range of photochromic dyes, with a wide range of colours and a choice of activation and fade kinetics.

Photochromic dyes find use in a wide range of end uses. Ophthalmic lenses are the largest application, but other major applications include: children's toys, agricultural films, novelties, packaging, security markers, clothes and cosmetics. Many other applications are currently being investigated.

Request for specifications and quotation

Thermochromic Pigments


Pigments characterised by their ability to change colour or discolour on contact with heat. We offer a range of pigments which are brightly coloured and become colourless when in contact with heat. They return to their original colour when the heat source is removed. These pigments are easily incorporated into printing inks, coatings & plastics. Novelty effects and temperature safety indicators are the main end uses.
Thermochromic Pigments

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Thermochromic Red-before being exposed to body heat

Thermochromic Red-before being exposed to body heat


The thermochromic red pigment offered to clients changes its color or gets discolored before it is exposed to body heat. Our chemical has a non harmful nature and is available in varied packaging options. We offer the range of product at the most affordable prices to our clients.

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Thermochromic Red-colour fades on exposure to body heat


The thermochromic red we offer to clients is mainly used in creating novelty effects. Color of these pigments fades on exposure to body heat. These pigments comes in to their original color as soon the heat source is removed from the place. We offer these products at the most reasonable prices to clients.
Thermochromic Red-colour fades on exposure to body heat

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