A fluorescent substance added to detergents in order to produce a whitening effect on laundry.
More example sentences
- Softeners, optical brighteners, and antistatic agents also may be used on some fabrics.
- As a result, the materials that contain optical brighteners appear to reflect more light than is incident upon them and the blue-violet emission tends to offset yellowish reflected light making the material appear whiter.
- Arches Bright White is created without optical brighteners or bleaches with only the purest well water and cotton fibers, company officials said.
Definition of optical brightener in:
- The US English dictionary