To plot these densities on the graph, find the density value reading of step 1 and place a dot at that point. Do the same with steps 2 through 21, as shown in figure 24. After plotting all the readings, connect the plotted points with a french curve and straightedge (fig 2-5) . You do not necessarily want to connect each plotted point. The resulting curve should be a smooth, flowing line with no angles apparent. Remember to label every graph with all the pertinent information, because information that is not recorded on the graph may be lost or forgotten. This

Figure 2-3-How a sensitomerer is used to produce sensitometric strips.

information should include the type of developer, the development temperature, the development time (or machine speed), the type of film, the agitation used, and so forth.