However, most Danish Oils contain many of the following: Mineral Spirits; Aromatic Petroleum Distillates; Mineral Oil; Stoddard Solvent; Tung Oil; Linseed Oil; Man-made and/or Natural Resins Typically, boiled linseed oil or tung oil is used. Its name appeared the second half of the 20th century when many companies in Europe produced Danish oil from various kinds of ingredients. Danish oil is a popular wood finish, and it’s basically a mixture of an oil, a varnish, and a thinner. What does Danish Oil contain? The ingredients contained in Danish Oil is extremely varied with each manufacturer having their own proprietary mixtures and percentages. Together, these ingredients really do bring out the natural beauty of the wood, while providing more surface protection than plain oil finishes. Danish oil is not pure oil; it is a mixture of Tung oil, varnish, linseed oil, and mineral spirits.