Oil's use on paintings (2)
2007-4-18 2:11:43 Post:Sam | Categories:doupine | Comment:0 | Quote:0 | Browse:
STEAM PRESSED OR REFINED LINSEED OIL
When the flaxseed is steam heated and then pressed it yields more oil, thereby making refined linseed oil a more affordable medium for artists and for use as a binder in oil paints. The process of steam heating the flax seeds produces more waste, so this waste has to be removed through a refinement process. The oil is treated with an acid which removes the waste materials. The acid is then neutralized with an alkali solution. Refined linseed oil can be used to thin oil paint and increase brilliance and transparency.
SUN THICKENED LINSEED OIL
Sun thickened linseed oil is a thick bodied medium that is produced using the heat of the sun. An equal amount of both linseed oil and water are mixed together in a container and left in sunlight for several weeks or longer. The water and linseed oil eventually separate resulting in a thicker oil with a honey like consistency. Sun thickened linseed oil is not used as a binder in oil paints but as an independent medium that improves flow and increases gloss. Sun thickened linseed oil has less of a tendency to yellow and speeds drying.
(to be continued)