Tintype dating a
Up to this stage, photos were generally one-offs, there was no negative and multiple copies were impracticable.
Any copies required had to be photographed from the original – often with a distinct loss of quality.
Nobody, apparently, knows who the women in this Victorian picture were.
Of course, some have argued that they were just respectable Victorian matrons playing dress-up for some reason.
The collodion process is said to have been invented in 1851, almost simultaneously, by Frederick Scott Archer and Gustave Le Gray.