Figure 2-5.—Drawing the characteristic curve.
Notice in the toe section of the illustration (fig.
affected by light, and the density is not a result of
2-6) that steps 1 through 4 do not show a change in
exposure, but of the emulsion base and the emulsion
density. This indicates that the film has not been
fog (gross fog) present in all emulsions. Step 5 shows
2-11
