48 



The Microscope 



53 



54 



Figs. 51, 52, 53, and 54. Developing 35-mm roll film in a tank. Fig. 51 shows the 

 film being wrapped on the stainless-steel film holder of a "Nikor" tank. There are 

 many other types of tanks. Fig. 52 shows the developer being poured in through the 

 light-trapped lid. Fig. 54 shows the film being washed through a rubber tube run- 

 ning to die bottom of the tank. Fig. 53 shows the washed film being removed from 

 the roll before being hung up to dry. 



5. Pour fixer back in bottle. Remove cover from tank and flush out 

 once or twice under tap. Either remove reel to large tank of running 

 water or leave in small tank and wash through tube (Fig. 54) taken 

 to bottom of tank. 



6. Pour off water and rinse for 30 sec in diluted Photoflo or similar 

 wetting agent. 



7. Remove film from tank (Fig. 53) and hang up to dry. 



Cut film ( steps 1-4 in darkroom ) : 



1. Place sheets in hangers (Fig. 55). 



2. Set all hangers together in tank of developer (Fig. 56) at recom- 

 mended temperature. Agitate for 15 sec. Then leave for recommended 

 time. Lift hangers, and drain for 10 sec, once every minute. 



3. Transfer hangers to tank of acid hardener (Fig. 57). Agitate 15 sec, 

 leave 3 min. 



