58 ELEMENTARY PHOTO-MICROGRAPHY. 



The handling of the paper and inspection of 

 prints should be done in subdued light. After 

 printing is completed, the paper is put in a com- 

 bined toning and fixing solution until the desired tone 

 is obtained, and then is washed thoroughly in run- 

 ning water, or by eight changes of water, allowing 

 five minutes soaking between each change. Every 

 maker of paper issues full instructions with each 

 packet, but, as nearly all differ, the reader should 

 buy a bottle of combined fixing and toning solution 

 from any photographic dealer, and simply wash his 

 prints well after they come out. If the reader 

 desires to prepare his own solution, the following 

 formula may help him : 



Ammonium sulphocyanide ... 15 grains 



Table salt 30 grains 



Hypo ... ... ... 2 ounces 



Water ... ... ... 10 ounces 



To this one grain of gold chloride in half an 

 ounce of water is added. 



The little clips similar to clothes' pegs are useful 

 for drying the prints. The paper is gripped at one 

 corner and suspended from a line until dry. Print- 

 ing frames should have open ends to enable the 

 paper to be raised for examination with ease when 

 the half back is folded over on its hinge. Some 

 cheap frames have a deep recess, into which the 

 negative and paper drop as into a box, making it 

 extremely difficult to inspect the process of print- 

 ing without creasing the paper in the endeavour to 



