PROBLEM TO BE SOLVED: To obtain a clean metal surface without causing environmental disruption, uneven drying and blotting by treating the metal with an aq. soln. prepared by diluting a pretreating agent for drying with a water having a conductivity below a specified value and drying the metal without washing it with water. ;SOLUTION: A pretreating agent for drying contg. 1 kind of compd. shown by formulas I to III is diluted with a water having 10μs/cm conductivity to prepare an aq. soln., and the metal is treated with the aq. soln. and then dried without being washed with water. In formulas I and II, R1 to R4 are hydrogen, an alkyl, an alkenyl, a cycloalkyl or phenyl, and the groups may have a substituent. In formula III, R1 to R4 are hydrogen, an alkyl or an alkenyl, the groups may have a substituent, X is hydroxyl, carbonate group or bicarbonate group, and (n) is 1 or 2. By this method, the dewatering substitution by solvents disrupting environment is not needed, and the clean metal surface is obtained without causing uneven drying and blotting.;COPYRIGHT: (C)1997,JPO
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