Stockholm tar is an especially high grade of pine tar which is used among mariners, and also to treat outdoor furniture and rope designed for outdoor uses. Hardware stores and maritime suppliers are a good source for Stockholm tar, which may also be labeled archangel tar. Typically, Stockholm tar is mixed with other substances like linseed oil to make a spreadable solution which can be applied with heavy brushes or rags.
In addition, pine tar has been shown to be antipruritic, anti-inflammatory, antibacterial and antifungal. These properties make pine tar suitable for the topical treatment of eczema, psoriasis, seborrhoeic dermatitis and other dry, itchy, flaky or inflamed skin conditions.
History
The production of tar in Scandinavia dates back to at least the 1400s, and it is probably even older. Tar is produced by burning pine in specially designed kilns which maintain a steady low temperature. As the pine burns down, the dense pitch runs out, and it is collected in a chamber located underneath the kiln. This process is known as “destructive distillation,” because it requires complete destruction of the wood to extract the valuable sap inside.
Originally, pine tar was extracted for use in ship building. A layer of pine tar could be applied both inside and outside a ship to help weatherproof it, ensuring that the wood resisted rot. Pine tar was also used to treat ropes and fixtures on ships so that they could endure long journeys, and furniture makers got the bright idea of applying pine tar to outdoor furnishings, as well.
It is not surprising that the production of pine tar took off in Scandinavia, given the region’s heavy pine forests. Within Scandinavia, tar from various regions was considered better than tar from other regions, and eventually a monopoly of Swedish tar producers arose in Stockholm, acquiring the best tar and selling it at a high price. As a result, high quality pine tar came to be known as “Stockholm tar,” referencing the city which dominated tar production from the late 1600s to the late 1800s.
Topical pine tar: History, properties and use as a treatment for common skin conditions Pine tar is the end product of pine wood carbonisation following distillation using extreme heat. An extensive literature search was conducted back to the 1950s for this review. Pine tar has been used in medicine for more than 2000 years to treat a range of skin conditions because of its soothing and antiseptic properties. Pine tar should not be confused with coal tar, which has been produced from coal for approximately a hundred years. Pine tar is thought to exert its effect by reducing DNA synthesis and mitotic activity, which promotes a return to normal keratinisation. In addition, pine tar has been shown to be antipruritic, anti‐inflammatory, antibacterial and antifungal. These properties make pine tar suitable for the topical treatment of eczema, psoriasis, seborrhoeic dermatitis and other dry, itchy, flaky or inflamed skin conditions. Topical products available over‐the‐counter in Australia today contain up to 2.3% pine tar, and come in several different formulations that can be used on the entire body, including the face. Modern day pine tar is manufactured with increased purity to eliminate toxic phenol and carcinogenic components, which have been of concern in the past. Primary irritation is uncommon. In conclusion, the long experience with topical pine tar therapy and its worldwide usage, together with the evidence presented in this review, suggests that pine tar is an effective treatment with minimal safety risk.
Pine tar has been used to cover peck wounds in captive bird flocks such as chickens, to prevent continued pecking on a wound and cannibalism.
Pine tar is also used in veterinary medicine as an expectorant and an antiseptic in chronic skin conditions.