PRACTICAL PHOTO-MICROGRAPHY. 129 



development, the scope allowed for variations in exposure, 

 provided the exposure has been sufficient, and the color of the 

 deposit or image, lead us to recommend this developer with 

 much confidence. But the pyro and hydroquinone develop- 

 ers so act upon the soluble substance of transferotype paper as 

 to make the stripping not by any means impossible nor even 

 difficult but less easy than after ferrous oxalate development. 



The image on bromide or transferotype paper can by various 

 proceedings after fixation be toned to various colors ; for 

 details of these matters we must refer our reader to general 

 photographic literature. 



The method of developing bromide papers for enlargements 

 and transferotype paper for lantern slides is practically identical 

 with the method we have given in this chapter. 



Bromide paper offers a vastly greater prospect of permanence 

 of result than other silver printing processes ; in fact a bromide 

 paper print produced with proper precautions is in point of 

 permanence, as it is in point of beauty, inferior to no purely 

 photographic print that at present we know how to produce. 



A very pretty effect may be produced by attaching a number 

 of transferotype prints, arranged in an artistic manner, to a 

 sheet of opal. The prints being trimmed with scissors to the 

 desired shapes are, in the bath of plain water after fixing and 

 washing, caused to adhere to the opal plate in their desired 

 positions. The plate bearing the prints is in the usual way 

 removed from the water and the prints are carefully squeegeed 

 into perfect contact. The prints are then allowed to dry, and 

 the stripping in hot water performed thereafter. 



