But with his next train of thought he gave photography a significant boost: bitterly disappointed by his drawing skills, Talbot wanted to find a method which would “permanently replicate the image and keep it on paper perpetually”. Two years later, he was successful in this: the development of the negative-positive procedure made it possible (in contrast to the daguerreotype) to reproduce pictures by printing them from negatives.
From this moment onwards, photographic procedures continued to improve. The albumen procedure became prevalent, the wet collodion plate was invented and the required exposure times were drastically reduced by these new technologies. Unfortunately, the equipment was anything but suitable for travelling. It was very heavy, sometimes chickens had to be taken along (as a source of egg white for developing pictures) and the chemicals used were so dangerous that some photographers even blew themselves up along the way.