… dehydrated, sulphurised, blown, polymerised by heat in vacuum or in inert gas or otherwise chemically modified, …
Explanatory notes
… dehydrated, sulphurised, blown, polymerised by heat in vacuum or in inert gas or otherwise chemically modified, … sulphur or sulphur chloride to cause polymerisation in the molecules. Oil thus processed dries more rapidly and forms a … by heat in vacuum or in inert gas are certain oils (particularly linseed oil and tung oil) which have been …