PROBLEM TO BE SOLVED: To provide a water-soluble cutting oil having putrefaction resistance which does not generate putrefactive odor, capable of maintaining a preferable state of a work environment in a factory for a long period, at low cost, without providing a dedicated device for preventing generation of bad odor.SOLUTION: A basic copper sulfate, a dispersant, and an extender are added to a water-soluble cutting oil, in which, density of the basic copper sulfate in the water-soluble cutting oil is in a range of 0.00145%-0.14%.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】腐敗臭が発生しない耐腐敗性の水溶性切削油を提供し、悪臭防止のための専用装置を設けなくても、低コストで工場内の作業環境が長期にわたり良好な状態に保たれるようにする。【解決手段】水溶性切削油に塩基性硫酸銅を分散剤、増量剤とともに添加する。水溶性切削油中の塩基性硫酸銅の濃度は0.00145%から0.14%の範囲になるようにする。【選択図】なし
