PHOTOGKAPHIC PKOCESSES 289 



1 c.c. of the gold -chloride solution. The print, after washing, 

 is placed in this gold-toning bath, and toning is allowed 

 to proceed until the stage at which the desired colour occurs 

 has been passed ; that is, the process is allowed to go on 

 farther than appears necessary, as some of the acquired colour 

 is lost in fixing. The print is washed in several changes of 

 water, and is then fixed in a solution of hyposulphite of soda 

 half the strength recommended for the fixation of negatives. 

 The print is again washed for an hour or more in running 

 water, and hung up by a corner to dry. It is important to 

 note that the solution for toning must be used in a perfectly 

 clean dish and measure, so that no contamination from 

 developing-solutions result. The hyposulphite solution must 

 also be quite fresh and not one that has been used for any 

 other fixing purpose. 



The artificial-light printing method is that usually referred 

 to as bromide-printing ; and possibly from most points of view 

 it is to be preferred. Bromide papers are much more sensitive 

 to light, and must be dealt with in the dark-room as in dealing 

 with sensitive plates, except that their sensitiveness is much 

 less, and the developing process may be carried out in yellow 

 or orange light. A white paper, and one having a highly glazed 

 surface, should be chosen. Such papers are made in varying 

 degrees of rapidity, and may be described as rapid, slow, and 

 very slow. The rapid papers are those usually sold for enlarge- 

 ment purposes, whereas the very slow ones are usually known 

 as 'gaslight ' papers. The latter may be dealt with in any weak 

 artificial light other than actual non-actinic light. To obtain 

 the most brilliant results it is, however, better with any of 

 these papers to work in yellow light, as even the gaslight 

 ones are still sensitive enough to become somewhat veiled if 

 exposed to white light for any length of time. 



The choice of a rapid or slow paper will depend largely on 

 the negative ; and it is possible by selecting a slow bromide 

 paper to obtain a much brighter and harder print from a weak 

 negative than can be obtained on a more rapid paper. This 

 point is one of considerable importance, and where negatives 

 varying considerably in density are being dealt with, the results 

 may be modified within wide limits by selecting a paper 

 suited to any particular class of negative. As. the image 



