1872. “Emaux Photographiques” (photographic enamels), second edition, by Geymet and Alker, Paris.
1873. J. Burgess, of Peckham, advertised his gelatino-bromide of silver emulsion, but it would not keep, so had to be withdrawn.
— Ostendo non Ostento published a gelatino-bromide of silver formula with alcohol.
— Platinotype process patented by W. Willis, junior, June 1st.
1873. R. Kennett’s gelatino-bromide of silver pellicle patented November 20th.
— “The Ferrotypers’ Guide” published by Scovill Manufacturing Company, New York.
1874. R. Kennett issued his gelatino-bromide of silver dry plates in March.
— Gelatino-bromide of silver paper first announced by Peter Mawdsley, of Liverpool Dry Plate Company.
— “Backgrounds by Powder Process” published by J. Werge, London.
— Flexible supports in carbon printing patented by John Robert Sawyer, of the Autotype Company.