None more black

A new technique for generating really light-absorbing black tints is advancing telescope manufacture.

Researchers have created the blackest black ever made on Earth, by bubbling a shiny metal plate in nitric acid for a few seconds.

This new super-black coating produced by Richard Brown and his colleagues at the UK's National Physical Laboratory (NPL) in Teddington is designed to revolutionise the manufacture of optical instruments.

Link Discuss (Thanks, Ernie!)