Linseed Oil. Specially modified oil mediums have been developed to work seamlessly with LUKAS Berlin Water‑Mixable Oil Colours, providing the benefits of classic oil mediums without compromising their water‑miscibility. LUKAS Berlin Linseed Oil Modified slows the drying time while enriching the paint, creating a thicker, more buttery consistency. It can also be used as a binder for producing your own water‑mixable oil colours, preserving the unique properties of this paint type.