Edited sentence: After years of reading on dageurreotypey and other early photographic processes I don't think it can be said that the inability to reproduce the image due to the absence of a negative was the "perhaps most importantly" factor in the dageurreotype's demise, as stated in the previous version of this article.By the end of the 19th century the Calotype/Albumen print process had replaced all previous contenders, none of which used a negative/positive process --- James Arbogahst -->.The main evidence being that neither tintypes nor ambrotypes had negatives and could not be reproduced either, yet they supplanted dageurreotypey