This document specifies a test method for removal of machine oil stain from a noncorrosive metal surface using fine bubble water. A test is provided to show the comparative cleaning advantage of adding fine bubbles to the water.
PUBLISHED
ISO 21256-2:2020
PROJECT
ISO/FDIS 21256-2
50.20
Proof sent to secretariat or FDIS ballot initiated: 8 weeks
Oct 30, 2026
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