抄録
Grease, oil and rust should be removed from the surface of the articles before painting. Though small arcicles can be done it well easily, big ones apt to be painted after imperfect treatment, such as wipeing with waste rag wetted with gasoline and removing rust with sand paper.
This research of treatment satisfy the following requirement that;
a) can remove oil, grease and rust at the same time.
b) need not special neutralizing liquid, but have only to wash with water.
c) need not quickly dry but have only to wipe with waste rag.
d) cost of treatment is comparatively cheap.
The research have concluded the liquid which has the following contents
Conetnts of liquid
Phosphoric acid; 10%
Alkylbenzene sodium sulphonic acid; 3-5%
Water; remainder
