MAKING PRINTS 509 



Dissolve the chemicals in the order named. While the 

 above amount of bromide is usually sufficient, it may at 

 times be found that in order to produce clear whites, more 

 bromide must be added by using a few drops of the fol- 

 lowing solution: 



10% Bromide Solution. 



Avoirdupois Metric 



Potassium bromide 1 oz. 50 grams 



Water 9 oz. 450 c.c. 



Developing is carried out as follows : Put sufficient de- 

 veloper in the tray to cover the prints quickly. Immerse 

 the print face up by placing one edge under the solution and 

 giving it a quick push so as to instantly cover the surface. 

 Remove any air bells -with a tuft of cotton. Allow the print 

 to remain until the image has reached the desired depth. 

 The developing and fixing must be conducted in an orange 

 or yellow light or very weak lamp light. If too strong a 

 light is used the whites will fog. 



After developing, the prints should be quickly put in the 

 fixing bath. A simple solution of sodium hyposulphite in 

 water (1 oz. to 4 oz.) may be used for fixing prints for 

 temporary uses but for more satisfactory work an acid 

 fixing bath made up as follows is advised: 



Fixing Bath. 



Avoirdupois Metric 



Water 64 oz. 2000 c.c. 



Hyposulphite of soda 16 oz. 500 grams 



Dissolve and then add the following acid hardener : 



Avoirdupois Metric 



Water 5 oz. 150 c.c. 



Hyposulphite of soda (dried powder) % oz. 15 grams 



Acetic acid 3 oz. 90 c.c. 



Alum (powdered) V-2 oz- 15 grams 



This fixing bath is also recommended for plates and 

 films. It will keep indefinitely and therefore may be made 

 up some time in advance. One pint of the bath should fix 

 at least fifty 4x5 prints. The acid fixing bath can be used 



