Wiktionary
n. (context metallurgy English) Any substance added to an electrolytic bath to yield a brighter electroplated surface.
Usage examples of "brightener".
A new denture cleaner and brightener, a new itch fighting shampoo, the radiant testimonial of a halitosis survivor nonchalantly sweeping up dead leaves with a bamboo lawn rake whipped up in a Chinese prison and back to news on the economic front, the trade deficit, a burgeoning bank fraud, a lugubrious President announcing China's most favoured nation status chewing your bandages?
The screen had simmered down to display a new denture cleaner and brightener Lily?
He scattered Fluorescein Yellow with Optical Brightener into the water.
Yet it was like Ragnarok for his old gods, when the great god, Heimdall, the World Brightener, would blow his horn summoning the gods of Aesir to their final battle.
The image he saw was a haberdasher's triumphcrisp white djellaba gleaming with optical brighteners, dark cloak discreetly bordered with kaleidotape, silver dagger with a jeweled pommel stuck in his sash, silk foulard headcloth from Harrod's of Tharsis, English leather wingtips.
His turban stood two feet high, precious jewels winked all over his costume, and his gold lamé vest and flowered silk pantaloons had been enhanced by optical brighteners.
Nonrecycled, high-acid, coarse pulp with minimal optical brighteners and low luminescence.
Optical brighteners have been added to paper for nearly fifty years and it's unusual, even in cheap paper like this, for there to be an uneven-ness in the brilliance.