On the Test of a Polyester Aerial Photographic Film T-008
By
Michiharu Takeda*
I. Preface
In 1963 Fuji Photo-Film Co. developed a polyester aerial photographic film
T-008 and Japan Society of Photogrammetry was asked its practical test. Ans
wering to this request, JSP organized a special committee for the investigation
of an aerial photographic film under commission I. This is the report of the
test.
Fuji Photo-Film Co. Ltd. had over 10 years experience on the production
of aerial photographic films before the war. Although the production was stopped
by the defeat of our country, preparatory investigations for the production of
aerial photographic films resumed in 1953 and Fuji Aerial Photographic Film
KOK was produced. After the practical test performed by Forestry Technique
Society of Japan, the report of which was published in Oct. 1961, KOK aerial
photographic film was supplied to Japanese surveying companies for the practical
purpose. The new film is coated with the same emulsion as KOK film, the only
change is that polyester film base is used instead of tri-acetate cellurose (TAC)
film base.
The object of our test is as follows:
1) To clarify the practical applicability of the new photographic film for
the manipulation of camera and for the photographic treatment. And
special weight is laid on the possibility of static marks by the high
altitude photography.
2) To confirm the irregular shrinkage of the photographic film.
We couldn’t clarify the problem of static marks sufficiently because of aerial
photography was performed past winter, the driest season in our country.
In accordance with the aim the following three serieses of tests were carried out
1) Practical manipulation at the aerial photography and the photographic
treatment.
2) Study of the irregular shrinkage by means of the relative orientation
of stereo-models.
3) Laboratory test on the photographic and physical properties of the
photographic film.
Four aerial surveying companies (Asia Aerial Surveying Co., Ltd., Higashi
Nihon Aerial Surveying Co., Ltd., Pacific Aerial Surveying Co., Ltd., and Toyo
* The Nihon University. Tokyo, Japan.
