Rather than using toxic and unpredictable lead drying agents, Michael Harding has prepared a selection of oil, resin, balsam, and wax painting medium creations that will safely yet traditionally alter your paint film to suit your painting needs! In place of traditional sun-thickened linseed oil, Harding’s formula utilizes the best grade viscous linseed stand oil, given its ability to self level, imparts elasticity into the paint film, and does not yellow or darken appreciably over time. Otherwise, the raw materials used are consistent with those of the past. Mediums and varnishes are available in 100ml and 250ml jars. See description tab for information on each individual medium.