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Optical Brightener is a compound that absorbs the invisible ultraviolet component of sunlight in the 300-400nm range & reemits it as visible light at the blue end of the spectrum due to fluorescent mechanism.
During this mechanism the brightener molecules are excited to higher energy levels & come back to their ground state by emission of radiation which is fluorescence.
Normally whiteness in substrate can be improved by increasing reflection & compensating the blue defect.
They are used to improve the initial color, hide natural yellowing of plastic, and brighten colors. Please address us for details and grades
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