On the Test of a Polyester Aerial Photographic Film T-008 
119 
TAC films are printed from a glass mesh plate, an accessory of Stereo- 
planigraph. Then a diapositive of CNT film is printed from each 
negative. 
The structure of the printer used is as follows 
Light source: 35V, 100W bulb. 
Distance between the bulb and a opal glass plate: 10 cm. 
Distance between the opal glass plate and the deck glass plate: 1.2m. 
Flattenning of films: Sucking system. 
The photographic treatments of negative and diapositive films are similar 
to 1) b. 
b. Shrinkage measurement: For the measurement of the film shrinkage 
intervals 1-4 and l'-4' (Fig. 14) are measured by a comparator shown 
on Fig. 13. Then the shrinkage of the negatives and the diapositives 
are calculated comparing to the corresponding intervals of the original 
6 glass mesh plate. The results are summariezd on Table-8 and Fig. 14. 
c. Analysis of the results: Following conclusions are got from the meas 
urement of test materials. 
Fig. 13. Comparator. 
Table 8. Irregular shrinkage 
Negative film 
Shrinkage 
Positive 
film 
Shrinkage 
Op 
On 
X 
o n 
X 
Op 
PET 008A 
-0.053°* 
±0.008°* 
CNT 
-0.031°* 
±0.020^° 
2.5 
// 008B 
-0.050 
0.010 
—> // 
-0.025 
0.017 
1.7 
TAC 
-0.240 
0.018 
—» n 
-0.083 
0.028 
1.6