Why the ground beneath your paint determines how your painting ages, and what the failure of Jan van Goyen's work teaches us.
Before you mix a single color, before you plan a composition, before you pick up a brush, one decision has already begun to determine whether your painting will last a hundred years or collapse into an unreadable ruin: the preparation of your ground.
This is not a small technical detail. It is the most consequential archival choice a painter makes.
Oil paint darkens and becomes increasingly translucent as it ages. The oil binder's refractive index increases over decades, and certain pigments reactive to fatty acids (most notably lead white and zinc white) dissolve partially and form metallic soaps that further alter the optical behavior of the film.
The consequence is predictable: if your ground is dark, thin, or transparent, it will increasingly show through your paint layers as they become more translucent. The ground's color, and in panel paintings, even the texture and grain of the support beneath it, will gradually contaminate every color passage above.
Imagine your painting as a stack of colored glass. With time, each pane becomes progressively more transparent. Whatever lies beneath the stack inevitably begins to show through.
The 15th-century Flemish painters, most famously Jan and Hubert van Eyck, prepared their panel grounds with extraordinary care, applying multiple layers of thick, opaque white chalk or lead white gesso. This created a ground so bright, dense, and reflective that even as the paint above it aged toward transparency, the ground continued to radiate light back through the layers.
The luminosity we admire in Flemish panel paintings is not solely a product of glazing technique. It is the ground working in conjunction with the paint. Centuries later, these works remain among the best-preserved in Western painting.
Rublev Colours offers three grounds that meet these archival requirements, each suited to different working methods:
A blend of lead white, titanium white, and ground calcite (chalk) in alkali-refined and bodied linseed oil. Lead white contributes flexibility, adhesion, and that characteristic chalky-bright optical quality that pure titanium white lacks. Titanium white adds covering power. Calcite provides controlled porosity, enough tooth for the paint to grip, without the excessive absorbency that strips oil from the first paint layers and causes matte, weakened films. Two coats are typically sufficient, though more coats produce a smoother and more opaque surface. Dries within two days to one week depending on conditions.
Uses the same lead white and titanium white pigment blend but in an alkyd resin binder, which dries significantly faster than the oil version. This is a practical choice when you need a lead-based ground but cannot wait several days between coats. It offers the same optical brightness and adhesion benefits of lead white with a faster turnaround.
A lead-free alternative for artists who prefer to avoid lead pigments. Titanium white in an alkyd binder provides excellent opacity and a bright, clean surface with fast drying. While it lacks the flexibility and unique optical warmth of lead white, it is a sound archival choice, particularly on rigid supports where the slightly more brittle film is less of a concern.
Beyond ground preparation, the single most protective technique for long-term preservation is to build your painting from lighter to darker layers. This is the opposite of how many modern painters work.
As paint ages toward transparency, lighter underlayers continue to reflect light and support the visual integrity of the color above. Dark underlayers, as the paint becomes more translucent, increasingly contaminate the surface colors, pushing everything toward a murky mid-tone.
If your composition requires dark underlayers or a dark imprimatura, compensate with thick, opaque paint in your subsequent layers, preferably mixed with lead white, which provides exceptional opacity and film strength.
Your ground is not merely a primer. It is the permanent optical foundation of your painting for the next several centuries.