Black 4.0 Absorbs 99.95% of Visible Light, is Darkest Paint Currently Available for Purchase - TechEBlog

There's Vantablack, and then Stuart Semple's Black 4.0, which absorbs 99.95% of visible light. It took the British artist around 7 years to develop and works on all surfaces. Cleaning is a breeze, as Black 4.0 thins with water. To maximize Black 4.0, make sure to use a nice soft brush at room temperature and as little paint as possible while spreading it evenly across the surface. Ensuring enough time between coats is critical for a smoother finish, as it can seal porous surfaces with 25% PVA and 75% water. More information here. The stuff is so crazy I can’t

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