This short guide takes you through the process of Cyanotype Printing, the oldest form of photography. There are also links to some supporting resources.
Finely-ground borosilicate glass (coloured by trace metallic compounds) which melts at 800 to 820 °C is fused to the surface of certain metals. Kilns may be either electric or gas fired but some work can be done with a gas torch.
Production of a high-quality surface finish using an abrasive belt (linisher), graded polishing wheels or polishing compounds and a power-driven mop. Final finishing could be done by hand using liquid polish and a cloth.