The use of silver chloride paper dates back to the experiments of Thomas Wedgwood in 1802. H. Florence used chloride printing-out paper as did N. Niépce. William H. F. Talbot also used this paper for photogenic drawing. Silver chloride with an excess of silver was used with albumen, gelatin, and collodion binders. Gaslight papers were developing out a silver-chloride paper, but they were made with an excess of chloride rather than silver. These contact printing papers could be exposed using a common house-hold gaslight. The emulsion was not sensitive enough for enlarging.