Quote:
Originally Posted by Martti Kujansuu
Were the aeroplanes in the 1930s and 40s painted with oil based paints or what was the binder? Martti
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Hello!
Cellulose nitrate would have been the most used binder. I.e. nitrocellulose laquers. Even in Soviet Union. These were painted on all types of surfaces and materials. AII- (that is Roman numeral 2) and AMT- laquers.
Oil paint were also used on wooden and steel surfaces. Also on aluminium. Oil paints would not normally be painted on fabric surfaces. A- and AE- paints.
Some Soviet aviation primers were glyptal resins. Likely only as the major part of the mixture, though. IIRC ALG-5 (green) was one of them, but needs verification.
In 1943 or so perchlorovinyl primer for wooden surfaces was introduced. This paint DD-118 seems to have been used on interior surfaces only. Soviet aviation paints included also perchlorovinyl paints for exteriors but IIRC were not produced in quantity during wartime. Post-war they became a norm, apparently.
Some further reading:
http://naca.central.cranfield.ac.uk/report.php?NID=21
"Airplane dopes and doping" by
Smith, W H. A NACA report (nr. 38) from year 1919. Good and short - only five pages - explanation about cellulose acetate and cellulose nitrate dopes.
Search net with keywords like: stand oil, linseed oil, glyptal resin, alkyd etc. Good explanations are hard to find, though.
Pigmentation is whole another world to add.
Hope this helps some,
Kari