Linseed oil

From Free net encyclopedia

Linseed oil is a yellowish drying oil derived from the dried ripe seeds of the flax plant (Linum usitatissimum, Linaceae). It is obtained by pressing, followed by an optional stage of solvent extraction. Cold-pressed oil obtained without solvent extraction is marketed as flaxseed oil. It is suitable for human consumption, though not recommended for cooking and is used as a nutritional supplement which is high in omega-3 fatty acids, especially alpha-linolenic acid, and relatively low in omega-6 fatty acids, allowing it to be used to lower the ratio of omega-6 to omega-3 oils in the diet, which may have health benefits.

Boiled linseed oil was used as a paint binder or as a wood finish on its own. Heating the oil makes it polymerize or oxidise more readily, effectively shortening the drying time. Today most products labeled as "boiled linseed oil" are a combination of raw linseed oil, petroleum-based solvent and metallic dryers. The use of metallic dryers makes boiled linseed oil inedible. However there are some products available that contain only heat-treated linseed oil. These are usually labeled as "polymerized" oils though some may still be labeled as boiled.

Nutrient content of flax seed oil

Approximate per 100 grams (3½ ounces)

• Food energy 900 calories (3,800 kilojoules)
• Fat 100 grams
• Total dietary fibre 0 grams
• Protein 0 grams

Its uses include:

• Animal feeds
• Putty
• Sealants
• Caulking compounds
• Brake linings
• Linoleum
• Textiles
• Bicycle repair as a thread fixative and lubricant for the spokes of bicycle wheels
• Foundry products
• Leather treatment
• Polishes, varnishes and oil paints
• Animal care products
• Wood preservation
• Synthetic resins
• Oil painting medium: Includes such varieties as Cold Pressed, Bleached and Refined.

The linoleic acid in linseed oil is used as a dietary supplement.

Linseed oil has a special cultural place in cricket playing countries as treatment for the raw willow wood used to make cricket bats.

Safety Note: Rags soaked in linseed oil can self-ignite if stored in a confined space. They should be washed with water and disposed of carefully.de:Leinöl fr:Huile de lin nl:Lijnzaadolie pl:Olej lniany pt:Óleo de linhaça fi:Pellavaöljy sv:Linolja