… their fractions, boiled, oxidised, dehydrated, sulphurised, blown, polymerised by heat in vacuum or in inert gas or …
Explanatory notes
… their fractions, boiled, oxidised, dehydrated, sulphurised, blown, polymerised by heat in vacuum or in inert gas or … structure thereby improving their viscosity, drying power (i.e., the property of absorbing oxygen when exposed …