Classic Medium — This is a modified stand oil-based medium for painters who prefer slower drying. It’s ideal for thinning paint while maintaining a rich, luminous finish when dry, lends greater control for detail work, and offers longer manipulation time for over-painting, glazing, and wet-in-wet techniques. It can be used throughout a long painting process or for slow glazing on top of fast underpainting. Do not use fast drying mediums over the top of Classic Medium, as the tension between the paint layers caused by the different drying times may be strong enough to crack.

Fat Medium — 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.

Flow Gel — This is a loose gel that liquefies when brushed and stays in place when at rest, making it useful for developing new techniques. It can also be blended easily until it dries (within three hours). It also can be brushed over lightly for wet-on-wet techniques.

Lean Medium — This is a very fluid, general-purpose alkyd resin medium that can be used to increase the flow and transparency of Chroma Archival Oils, as well as for glazing and other thin applications. Its fast-drying properties allow a variety of techniques beyond what is normally possible with traditional mediums.

Odorless Solvent — This is a general-purpose, odorless solvent that can be used instead of gum and mineral turpentine to thin paints and clean brushes. Very little vapor is generated, resulting in healthier and more pleasant painting sessions.

Smooth Gel — This is a gel that helps move oil paint around easily while retaining texture and brush marks. Use a 50/50 mix with paint for thick impasto (15-60 mm). It’s also useful for those who desire less extreme applications of paint to dry quickly and retain marks and texture, while still being brushable and easy to manipulate. It also blends wet-in-wet when worked in with a brush or knife.

Texture Gel — This is a variation of Smooth Gel that contains ceramic beads for a gritty texture to add aesthetic appeal to thickly applied paint. It moves easily when mixed, then firms up on the painting, which is useful for keeping oil color separate wet-on-wet, or blendable for wet-in-wet techniques.