Is of printing, 
ale of 1:2,500 
)hic base film. 
)f the negative 
ed in one unit 
lys and dried 
for mapping 
emulsion on 
source at 6 to 
an air camera, 
ves to give a 
first process, 
e paper with 
ior revision of 
ng a box type 
Dad is used in 
temperature 
ned to replace 
double weight 
surfaced cork 
been found to 
lowering the 
F have been 
the prepara- 
8 lens it has 
per and used 
*s which use 
ces to ensure 
laterials used 
etc. Belgian 
des of paper 
desirable to 
irms. Glossy 
Partial tests 
Ders is quite 
standardized 
vely varying 
papers. Re- 
(47) 
Measurements Taken on Ordinary Bromide Paper by I.G.N., France 
A few hours after drying 
B. G. Kodak-Pathe Riviera Guilleminot 
Method of Drying 
Lengthwise 
Measurements 
taken on 22 cm 
Crosswise 
Measurements 
taken on 16 cm 
Lengthwise 
Measurements 
taken on 16 cm 
Crosswise 
Measurements 
taken on 22 cm 
1. Natural Drying 
Paper hanging in free air and flat 
tened, once dry, on round edge of a 
table 
shrinkage 
0-9 mm 
-0-41% 
shrinkage 
0-7 mm 
-0-44% 
shrinkage 
0-5 mm 
-0-31% 
shrinkage 
0-5 mm 
-0-23% 
2. Natural Drying 
Paper hanging in free air, subject 
to stroke of the hot press to flatten it. 
shrinkage 
0-9 mm 
-0-41% 
shrinkage 
0’75 mm 
-0-47% 
shrinkage 
•03 mm 
-0 19% 
shrinkage 
0 -8 mm 
-0-36% 
3. Drying on the glazer after wiping 
lengthwise 
expansion 
0-3 mm 
+0-14% 
expansion 
2 -3 mm 
+ 1 -44% 
expansion 
0 • 1 mm 
+0-06% 
expansion 
3 -2 mm 
+ 1 -45% 
4. Drying on glazer after wiping cross 
wise 
expansion 
0 -3 mm 
+0-14% 
expansion 
2 -2 mm 
+ 1-41% 
expansion 
0 ■ 1 mm 
+0-06% 
expansion 
3 -5 mm 
+ 1 -59% 
5. Drying accelerated in cabinet, stroke 
of hot press to flatten the paper 
shrinkage 
0-9 mm 
-0-41% 
shrinkage 
0-7 mm 
-0-44% 
shrinkage 
0-4 mm 
-0-25% 
shrinkage 
0-6 mm 
-0-37% 
6. Drying by means of the glazer with 
out wiping: 
(a) Length parallel to the axis of the 
glazer 
(b ) Width parallel to the axis of the 
glazer 
expansion 
0-6 mm 
+0-27% 
expansion 
0-2 mm 
+0-09 % 
expansion 
1 -8 mm 
+ 1-12% 
expansion 
2 -0 mm 
+ 1-25% 
expansion 
0 • 1 mm 
+0-06% 
expansion 
0 • 1 mm 
+0-06% 
expansion 
2 -2 mm 
+ 1 -o% 
expansion 
2 -8 mm 
+ 1-27% 
7. Quick drying on the rotative non 
glazing dryer (the most frequent case 
in Aerial Photography Section) 
shrinkage 
0-6 mm 
-0-27% 
shrinkage 
0-2 mm 
-0-12% 
shrinkage 
0-45 mm 
-0-28% 
expansion 
0-2 mm 
+0-09% 
Eight days after drying 
1. Natural Drying 
Paper hanging in free air and flat 
tened, once dry, on round edge of a 
table 
shrinkage 
0 • 75 mm 
-0-34% 
shrinkage 
0'4 mm 
-0-25% 
shrinkage 
0 -4 mm 
-0-25% 
shrinkage 
0-3 mm 
-0-14% 
2. Natural Drying 
Paper hanging in free air, subject to 
stroke of the hot press to flatten it. 
shrinkage 
0-5 mm 
-0-23% 
shrinkage 
0-3. mm 
-0-19% 
shrinkage 
0-2 mm 
-0-12% 
shrinkage 
0-2 mm 
-0-09% 
3. Drying on the glazer after wiping 
lengthwise 
expansion 
0-55 mm 
+0-25% 
expansion 
2 -5 mm 
+ 1 -56% 
expansion 
0-25 mm 
+0-16% 
expansion 
3 -6 mm 
+ 1 -64% 
4. Drying on glazer after wiping cross 
wise 
expansion 
0-7 mm 
+0-32% 
expansion 
2 -6 mm 
+ 1-62% 
expansion 
0 -2 mm 
+0-12% 
expansion 
3 -8 mm 
+ 1-73% 
S. Drying accelerated in cabinet, stroke 
of hot press to flatten the paper 
shrinkage 
0-9 mm 
-0-41% 
shrinkage 
0-2 mm 
-0-12% 
shrinkage 
0 -3 mm 
-0-19% 
no change 
0 
6. Drying by means of the glazer with 
out wiping: 
(a) Length parallel to the axis of the 
glazer 
(b ) Width parallel to the axis of the 
glazer 
expansion 
0-7 mm 
+0-32% 
expansion 
0-35 mm 
+0-16% 
expansion 
1 -9 mm 
+ 1 19% 
expansion 
2 -15 mm 
+ 1 -34% 
expansion 
0 05 mm 
+0-03% 
expansion 
0 -25 mm 
+0-16% 
expansion 
2 -6 mm 
+ 1-18% 
expansion 
3 -0 mm 
+ 1 -36% 
7. Quick drying on the rotative non 
glazing dryer (the most frequent case 
in Aerial Photography Section) 
shrinkage 
0-7 mm 
-0-32% 
shrinkage 
0-1 mm 
-0 06% 
shrinkage 
0-3 mm 
-0-19% 
expansion 
0-2 mm 
+0-09%