Natural oils (linseed, wood oil, castor oil, safflower oil etc.)
These oils are obtained in the process of squeezing-out of vegetable raw materials. For example, linseed oil, wood oil and castor oil are obtained in the process of squeezing-out of respectively linseed, nuts of tung tree and castor beans (Ricinus communis, plant from spurge family). Depending on origin and purification degree, these oils can have different color and odor. We use purified and clarified oils. If to use these oils in their pure untreated form, they dry up for a long time and do not form a stable film. Besides, the untreated linseed oil is quite sensitive to moisture. That is why we use special oils ennobling techniques not connected with chemical processes.