Understanding Neutron Radiography Reading V-Kodak Part 2 of 3

Graphical Solutions To Sensitometric Problems
Many of the problems in the foregoing section can be solved graphically. One
method involves the use of a transparent overlay (See Figure 50)
superimposed on a characteristic curve. Another method involves the use of a
nomogram-like chart in Figure 54. In general, the overlay method requires
less arithmetic but more equipment than the nomogram method. The
nomogram method usually requires somewhat more arithmetic but no
equipment other than a diagram similar to Figure 54 and a ruler or
straightedge. Graphical solutions of either type are often sufficiently accurate
for the purposes of practical industrial radiography.
Charlie Chong/ Fion Zhang
Radiography in Modern Industry. Rochester, NY: Eastman Kodak Co. 1980