The Musou Black paint can reportedly absorb 99.4-percent of visible light.
Sanded and finished a cube in the blackest paint in the world! : r/3Dprinting
Using a Paint Brush: Even when painted with a paint brush, Musou Black maintains the highest class light absorption rate of 98.8%! By applying
Musou Black Paint - Blackest Black in the World - 99.4% Light Absorption - 100ml
Unleash Your Power with Musou Black
Musou Black Paint - The Black Market
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Musou Black Color (1L bottle)
Unleash Your Power with Musou Black
The World's BLACKEST Paint? - The Black Market
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An Absence Of Light': Waltham-Based Lab Makes One Of The World's Blackest Paints
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Black 4.0 Is The New Ultrablack
World's blackest water-based acrylic paint - 99.4% light absorption Overwhelming blackness that opens up new artistic possibilities Compared to the 94-98% light absorption rate of common black acrylic paints, airbrushed MUSOU BLACK has a light absorption rate of 99.4%! Light absorption rate is 98.9% even when painted with a brush By creating a powdery coating layer on the object's surface with an airbrush, light is trapped inside.
Musou Black, World Blackest Acrylic Paint, 100ml x 2 Pack, 3.38 fl oz (Pack of 2)