Kolorjet Chemicals Pvt Ltd. - What makes the Dyes colored ?

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Kolorjet is one of the leaders among manufacturers and suppliers of a comprehensive range of quality dyestuffs, colors and chemicals for different industrial requirements. Our range of products include dyestuff, inkjetdyes, dyes for wax printing, textile auxiliaries, synthetic food colors, natural food colors, pigments, food ingredients, dyes intermediaries, fine chemicals, specialty chemicals, enzymes, optical brighteners and soap wax dies. An ISO 9001:2008 certified company, Kolorjet continues continues to play a leading role in the manufacturing of dyestuffs in India with the intent to further strengthen its position for its quality products. With our decades of experience and extensive industry knowledge, we have been able to face the challenges of the global market place and deliver quality products in adherence with market standards and parameters. Whatever be your specification or quantity desired, our expertise and quality of service always remains the same. Modern production and techniques and flexible processes and procedures allow us to offer efficient service for small batch as well as large orders. Kolorjet is a customer oriented company and work with the objective of achieving maximum customer satisfaction. The company has adopted innovative procedures and practices to meet customer expectations every time they deal with us. We always welcome any feedback or suggestions from clients in order to serve them better.

What makes the Dyes colored ?

Dyes are basically ionising and aromatic compounds, they have Chromophores present in them. Their structures have Aryl rings that has delocalised electron systems. These structures are said to be responsible for the absorption of electromagnetic radiation that has varying wavelengths, based upon the energy of the electron clouds.

Chomophores make the dyes proficient in their ability to absorb radiation. Chromophores act by making energy changes in the delocalised electron cloud of the dye. This alteration invariably results in the compound absorbing radiation within the visible range of colors and not outside it. Human eyes detects this absorption, and responds to the colors.

Electrons may result in loss of color, their removal may cause the rest of the electrons to revert to the local orbits. A very good example is the Schiff's reagent. As Sulphurous acid reacts with Pararosanilin, what happens is that a Sulphonic group attaches itself to the compound's central carbon atom. This hampers the conjugated double bond system of the Quinoid ring, and causes the electrons to become localised. As a consequence the ring ceases to be a Chromophore. As a result, the dye becomes colorless.

To conclude chromophores are the atomic configurations which has delocalised electrons. Generally they are represented as carbon, nitrogen, oxygen and sulphur. They can have alternate single and double bonds.

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