A box of 12 'Manchester' dry plate negatives by J.T. Chapman Ltd, Manchester, 1888. J T Chapman was one of the first to manufacture the gelatine bromide dry plate. His formula was used by Hurter & Driffield for their investigations on the sensitometry as it maintained a very accurate standardisation. Chapman's formula was published in 1873 in the British Journal of Photography. The Chapman dry plate was initially called the 'Lancashire' but was soon changed to the 'Manchester'. In 1968, Chapman plates made 80 years before were used successfully.
Printed label on box top: product name, maker's details, note on developing. Handwritten label on string: "54"