A 1907 article from Posselt's Textile Journal arguing for sodium peroxide as a bleaching agent for wool, cotton and silk. It compares sodium peroxide with sulphur and chlorine (chloride of lime) bleaches, describing their drawbacks such as impermanence, fibre tendering and residues that harm later dyeing. It also gives practical instructions for preparing and using the bath, including acid neutralization, the need for iron-free vats, lead steam pipes, neutral bath testing, and safe storage and handling of the chemical.