Understanding Neutron Radiography Reading V-Kodak Part 2 of 3

Figure 61: Abridged form of the exposure chart derived from a previous
figure, but showing exposures at 180 kV to produce a density of 1.0 on Film X.
Dotted lines indicate the metal thickness corresponding to the log E interval of
the figure above. If the separation of lines ABC and DEF is maintained, they
can be moved up and down the chart. They will then mark off a large number
of thickness ranges on the various kilovoltage lines, all of which will
completely fill the density range which has been assumed to be useful.
Charlie Chong/ Fion Zhang
Radiography in Modern Industry. Rochester, NY: Eastman Kodak Co. 1980