Archival Odourless Mediums and Solvents are based on fast drying alkyd resins which out perform ‘traditional’ mediums and are better for health. They evaporate much more slowly than turpentines so that very little vapour is generated during a painting session.

Archival Lean Medium

Alkyd Based - Fast Drying

A general-purpose alkyd resin medium. It feels oily, but dries with a low sheen in 24 hours. Increases flow and transparency, and the surface of a painting can be worked during a full day without tacking up provided the canvas is well sealed.  It can also be mixed with Archival Flow Gel if a little bodying up is preferred.

reference: www.chromaonline.com