.~ For metallic, siliceous, or calcareous basework, including chemical bleaching, oxidation or reduction {1}
3
.~.~ Including acidic agent
DEFINITION
Classification: 134/3
(under subclass 2) Processes which include treating the work with a substance having an acid reaction.
(1) Note. The use of acidic agents is common to many of the processes in this class, and for those excluded by the definition of subclass 2, the appropriate following subclasses must be investigated, some subclasses being set forth in the following notes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
27, for sequential treatments in which an acidic agent is neutralized or is used to neutralize another agent.
28, for sequentially used fluid agents one of which is acidic.
41, for acidic agents applied to metallic work.
42, for miscellaneous fluid agents used to remove particular materials including acid agents to remove materials from nonmetallic work.
