oil or castor oil, which are easily removed. more severe forming operations require metallic soaps or chlorinated/sulfo-chlorinated oils. when sulfo-chlorinated oils are used, the work-piece must be carefully cleaned in a de-greaser or alkaline cleaner, after each step (to prevent sulfur diffusion into...
oil or castor oil, which are easily removed. more severe forming operations require metallic soaps or chlorinated/sulfo-chlorinated oils. when sulfo-chlorinated oils are used, the work-piece must be carefully cleaned in a de-greaser or alkaline cleaner, after each step (to prevent sulfur diffusion into...