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'sikkativ' common root with the English 'dessicate'
or 'drying agent',
as in wet film applied drying, (really reacting/curing), to a tack-free coating.It's the age old problem,
pure no-additive Linseed Oil has minimal risks of hazards when applying,
it just takes forever to fully cure.'Boiled' Linseed Oil has heavy metal catalysts/drying agents that reduce the cure time,
but have significant exposure risks.
Yes I've been supplied some cobalt sikkativ (not sure on English translation) as well. But I reckon I want to do without and just use a UV light.