(49)
Tests made on waterproof and reinforced papers are summarized in the
following table.
Measurements Taken by I.G.N., France, on Various Waterproof or Reinforced Papers
Distortion in %
Manufacturer
Type
Country
Length
wise
Cross
wise
Remarks
Guilleminot
(October 1950)
Waterproof
Riviera
France
0-14
0-05
Bauchet
Special
platinum
France
0-30
1 -21
Has interest only for
rapid drying
Gaevert
(November 1950)
Waterproof
Belgium
0-14
0-47
Kodak
Chloride 2
United States
0 00
0-39
Kodak-Pathé
Waterproof
Velox
France
0-10
0-46
Crumière
(July 1951)
Waterproof
Draco
France
0-14
0-47
Gaevert
(Sept. 1951)
Waterproof
matte
Belgium
0-42
0-35
Mean of various
tests, each of them
far from being as
anisotropic.
Guilleminot
(October 1951)
Waterproof
Riviera
France
-0-10
-0-12
Crumière
(Feb. 1952)
Waterproof
Draco
France
-0-05
+0-02
Permanent and portable types of printers are illustrated in Figs. 15 and 16.
The printer for permanent installation uses a photoelectric device for exposure
determination. Contact is obtained with an inflated pressure pad controlled
by a manometer. The portable printers which are now rarely used have a
rubber pressure pad.
Germany
Agfa Lupex is used for prints and Agfa Brovira for enlargements. The base
Is usually paper which is not ferrotyped but for special purposes Agfa Correc-
tostat is used and ferrotyped. A Volk contact printer is used and a special
distortion correcting projection printer for Pleon photographs.
India
Bromide paper is used in an A4 printer with inflated pressure back. Pro
cessing is manual. Typical ambient conditions are 80°F and 60% relative
humidity. Air-conditioned paper storage is used. Prints are not ferrotyped.
Italy
All prints are made on bromide emulsion on glass plates. Both contact
and reduction printers are used. The reduction printer used with the Santoni
cameras is the RFG-3 printer constructed by Officine Galileo. It allows re
duction from a maximum format size of 23 x 23 cm to a maximum reduced
