49° 



RECREA TION. 



PHOTOGRAPHY IN COLORS. 



Yet another process comes from France. 

 At a recent meeting of the Societe Fran- 

 chise, M. de Saint Florent read a paper on 

 a new process he had discovered. Celloidin 

 (collodio-chloride) paper was used, ex-, 

 posed to sunlight until it had assumed a 

 reddish-black color. After this the paper 

 was immersed for 10 minutes in the follow- 

 ing bath: 



Alcohol (36 deg. Beaume). .3 ounces. 



Glycerine 2 drachms. 



f Tincture of iodine (24 p. c.) .2 drachms. 

 Ammonia (.880) 6 drops. 



After drying in the dark room, the paper 

 was exposed under a colored transparency, 

 to direct sunlight, for an hour or so, until 

 the colors appeared. It was then fixed in 

 a 6 to 10 per cent, solution of hyposulphite 

 of soda. While in this bath the colors came 

 out brilliantly and then faded to a lemon 

 yellow color, when the print was withdrawn 

 from the bath and washed rapidly, after 

 which it was dried in the sun, or in front of 

 a bright fire. This caused the colors to 

 reappear in all their brilliancy, and to re- 

 main permanent. This sounds too good to 

 be true, but it is easy to verify the author's 

 statements. As will be readily seen, the 

 process is essentially different from that of 

 M. Graby— " Photogram." 



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