Which is optical brightener?

Optical brighteners, optical brightening agents (OBAs), fluorescent brightening agents (FBAs), or fluorescent whitening agents (FWAs), are chemical compounds that absorb light in the ultraviolet and violet region (usually 340-370 nm) of the electromagnetic spectrum, and re-emit light in the blue region (typically 420-470 nm) by fluorescence.

What are the uses of optical brighteners?

Optical brighteners are used to mask the inherent yellowness of plastics and are used to improve colors and make plastic look whiter and brighter.

Why is Oba called white dyes?

The development of OBAs had meant that this slight addition of blue can be obtained through the light reflected by the OBAs in the presence of ultraviolet radiation. This makes white textile whiter and brighter.

Optical Brightening Agents

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