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photography. The change of each information which is 
contained in the duplicated images in the color copies were 
examined. 
All tests were conducted by the flow diagram shown in 
Fig. 11. An aerial color photograph which seemed to have 
‘A good tone quality was selected and three kinds of test chart 
were added on the photography. 
Fig. 12 shows the test aerial photography with 15 test 
color patches, a resolution test chart and grey step tablet, 
This test image was printed on an aerial color negative 
film, #2445,and an aerial reversal color film, #2448, and used 
as original films for the quality evaluation test. 
From those two films, duplicated images were prepared by 
using the color papers as Kodak 37RC, Fuji, Sakura, Mitsubishi, 
Kodak 14RC, chibachrome CCP, and if necessary, duplicating 
films as Kodak #6120, #4109, #2447, #6110 and Chibachrome CCT, 
and the qualities of those duplicated images were measured. 
4-1 TONE REPRODUCTION CHARACTERISTICS 
Fig. 13 and 14 show the tone reproduction characteristics 
of the color papers #37RC and #14RC, respectively, which were 
duplicated from the origingal positive #2448, The color 
balance of the #37RC paper was better than that of the l4RC 
paper. 
Cyan layer of Chiba-chrome CCT duplicated from the 2445 had 
a lower gamma compared with the other two layers and the color 
of duplicated image became reddish. This means that the 
Chiba-chrome CCT does not match with the aerial color negative 
film $2445 (Fig.15). 
Tone reproduction characteristics of the duplicated images 
produced by using the duplicating films; (2445-4109-6110-37RC) 
and (2448-2447-6120-37RC) were shown in Fig.16 and Fig.17. 
In these images,the good color balances were obtained in 
the highlight and the medium part, but not in the shadow part. 
The black became to be reddish, 
In order to predicate numerically the tone reproduction 
quality of the duplicating system radiation transfer,a contrast 
index was defined. This index is calculated by using the 
following equation from differnces of the densities A Dp of 
the original film which corresponds to two magenta densities 
D122.0 and D5-20.3 of the duplicated image. 
The image contrast = 1 : 104Dp