Art Spectrum Fat medium is recommended for experienced painters who work all day on the same painting. This syrupy, heavy-bodied liquid medium contains high solids to promote faster, more thorough drying of oils, and increase gloss and flow for enamel like effects. It can also be added to Lean Medium if a more glossy effect is desired. Odorless Fat Medium generates very little vapor, resulting in healthier and more pleasant painting sessions. Use in conjunction with Lean Medium in the fat over lean sequence.