Optical Brightener Powder (CI 71) 20kg Box

Optical brightening agents (OBAs), also known as fluorescent brightening agents (FBAs), or fluorescent whitening agents (FWAs),

are chemical compounds that give a whitening effect to the fabric.

They do this by absorbing light in the ultraviolet and violet region and re-emit the light in the blue region.

Fluorescent activity is a short-term or rapid emission response, unlike phosphorescence, which is a delayed emission. This blue light reduces the yellow color of the substrate and gives a bright look.

Another significant usage of the OBAs is in the textile industry where every cloth needs to be bleached before being processed as the raw material is full of impurities as well as in grey color.

However, bleaching doesn’t offer complete whitening, which leads to the necessary usage of Optical Brightening Agents (OBAs).

Optical Brighteners are used in paper mills to remove the natural yellowness of pulp and brighten the paper.

The optical brighteners can be applied in either the wet-end or dry end or both wet-end and size press applications.

These factors include the base sheet brightness and whiteness of the pulp, UV competitors, OBA retention, quenching effects, and OBA migration at the size press.

Many paper manufacturers use them in the dry end at the size press or by the surface coating application.