wu
Density
°
a
@
Dupont 502
©
Dupont 510
PTT
Yt
i Tie
10
1
i
Lt
tt
Exposure, roentgens
10
100
Figure 2.1 Cocalibration curves for film types.
(Film in NBS holder.)
6
4
ee
4
=
ar
ce
a
LZ
@
Dupont 606
© Eastman 112
3
LO
.
L7
°
0
e
°o
pots
tb
102
1
ee
Exposure , roentgens
10°
Figure 2.2 Cocalibration curves for film types.
(Film in NBS holder.)
16
tot top tis
to*