Learn how to paint Landscape Oil Paintings. Tutorials
by Andrew Whyte.
FREE Oil Painting for Beginners- Fat on Lean
The 'Fat on Lean' Paint Application Rule
Because oil paint mixes with oxygen to cure then we must assume
that if a pigment has higher oil content it will take longer to
cure. To prevent cracking of paintings then we must remember that
what is in the under layer must cure faster then what is on top.
The under layers must be lean and the upper layers must be fat.
We can control this using a lean mix (Less Oil than turps) in
the under layers and a fat mix (more oil than turps) in the over
layers. Prepared fat and lean mixes can be purchased from your art
supplies shop and are a good easy option. Be aware that some pigments
naturally contain more oils than others. Also be aware that lighter
colours attract less heat then dark pigments and will oxidize faster.It's
a juggling act that comes with experience and even then sometimes
problems will result.
The general rule is do not use too much mix as all you really
need to achieve is to loosen the paint slightly so it is easier
to apply.
Pre-mixes for both fat and lean can be purchased at any good art
supplies store and I prefer to use these for absolute ease of preperation.
