Durability of oil painting

The durability of oil painting depends on:

1. the painting materials used,
2. the composition of the binder,
3. the type of canvas and gesso,
4. the methods of painting,
5. the way the painting is stored.

Of greatest importance is the binder. Linseed oil is the best, then walnut oil. Other oils must be developed.
Linseed oil requires no treatment other than de-bleaching and purification.
Polymerized or oxidized oils are more durable, but the production of paints on oxidized oil is impossible, since such paints in tubes harden quickly.
Paints produced on polymerized oil are very thick.
It is most advisable to introduce resin varnishes and lotions into oil paints, which significantly increases the durability of the painting.
The components of the paints react variously to the oil with which they come into contact. Most paints entering into a relationship with oil increase the speed of drying (lead, cobalt and manganese compounds).
Zinc and copper dyes, although they enter into a chemical compound with oil, do not accelerate drying.
Paints of iron origin, such as English red, contribute little to accelerating oil drying.
Paints that accelerate oil drying have been found to strengthen the paint film, while paints that are neutral to oil reduce its durability.
Paints that attract moisture from the air, such as ultramarine and other clay-containing paints, are hygroscopic - by absorbing moisture they weaken the paint layer.