<p>A protective coating is provided. The protective coating comprises a synthetic resin solid content (A); and a mixture of (B-1) at least one member selected from an acetylene glycol represented by the following general formula (1):
an ethylene oxide - propylene oxide block adduct of an acetylene glycol represented by the following general formula (2):
and an ethylene oxide - propylene oxide random adduct of an acetylene glycol represented by the following general formula (3):
(B-2) at least one member selected from a polyoxyalkylene alkyl ether having an HLB of 8 to 18 represented by the following general formula (4):
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ - R 7 O(C 3 H 6 O) v (C 2 H 4 O) w (C 3 H 6 O) x (C 2 H 4 O) y (C 2 H 4 O) z H€ƒ€ƒ€ƒ€ƒ€ƒ(4) ;
and sulfur-containing surfactants represented by the following general formula (5):
or general formula (6):
and (B-3) water and/or a water soluble organic solvent.</p>
