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Home - Raw Linseed Oil(Linum Usitatissimum)

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Raw Linseed Oil




Raw Linseed Oil

Raw Linseed Oil(Linum Usitatissimum) Arrow

Linseed oil is derived from the seeds of the Flax plant. Linseed oil is yellow in colour. Linseed oil has resolvent properties, thereby making it highly useful for industrial applications. It is a slow-drying liquid with good preservative properties and water resistance. It is generally used outdoors, and can take up to three weeks to dry. It prevents corrosion and dry rot. It has long been used as a drying oil, a vegetable oil which undergoes oxidation and forms a natural, plastic-like film. The reactivity of Linseed oil can be improved by the addition of metal catalysts, called driers, which promote oxidation, and by partially pre-oxidizing the Linseed oil through exposure to the air. It was found that the addition of solvents such as Mineral Spirits, Japan drier, and Turpentine would speed Linseed oil's drying time, making it a more useful product. It is a versatile substance, depending upon how it is processed. It is used in various industries.

Which are summarized below:
Specifications of Raw Linseed Oil
Common Name Linseed Oil
Botanical Name Linum Usitatissimum
Mode of extraction Cold Pressed
Colour Yellow colour oil
Parts used Seed
Moisture and insoluble impurities percentage by mass (Max) 0.25
Colour in a ¼ in cell on the Lovibond scale express as Y + 10 R, not deeper than 35
Refractive Index @ 40ºC 1.4720 to 1.4750
Relative density @ 30ºC / 30ºC 0.923 to 0.928
Butyro Refractometer reading @ 40ºC 69.5 – 74.3
Iodine value (WIJS) 170 – 198
FFA as Oleic acid % w/w (Max) 2
Acid value (Max) 4
Saponification value 188 - 195
Unsaponifiable matter % Mass (Max) 1.5
Solubility Insoluble in water
Storage conditions Keep in a cool place, protected from light not more than 20°C

Uses of Raw Linseed Oil

In the Paint industry
Raw Lin Seed oil is the most commonly used carrier in oil paint. It makes oil paints more fluid, transparent and glossy. For oil-based paints, slow drying is a benefit, since this allows the paint to "level" itself, giving a smoother finish with fewer brush marks. It is also used as a paint thinner.

Linseed oil acts as a paint binder. It 'binds' the other ingredients of the paint together, both while in paste or liquid form, and while drying after use. Paint consists of some kind of coloring agent, usually finely-ground pigments of some mineral. This fine dust needs something to make it wet so it can be spread around, and needs something to keep it uniform, 'floating', so it doesn't all clump up and settle to the bottom. Linseed oil serves this purpose. It seeps into most surfaces or materials it comes into contact with. It helps bind paint to canvas or wood, bind new paint into old paint, and blend one color with a different color very subtly.

In the construction industry
Glazing putty, consisting of a paste of chalk powder and Linseed oil, is a traditional sealant for glass windows. It is used as a preservative for wood, in concrete, in caulking compounds, earthen floors, adobe and sealants. It is also used as a wood finish. It helps wood retain its natural moisture, aids in water repellence, retards cracking, checking and shrinking. It is used as an alternative to solvent-based products designed for sealing, polishing, waxing, varnishing and finishing. It helps to toughen surfaces by penetrating and then hardening even in the layers beneath the surface. Wood treated with Linseed oil is resistant to denting and scratches and is easily repaired. It helps in weather proofing large surface areas. Because of its drying and hardening properties when exposed to air and sunlight, it is also used in the manufacture of Linoleum. The floor covering Linoleum is made of ingredients such as wood dust, pine resin, wood flour, cork particles and other materials which are bound together with Linseed oil.

In the Agriculture and Livestock industry
Linseed oil is used in the maintenance of farm equipments, tools and articles. It is used in the garden for pruning shrubs and trees. It is also used in the making of many animal feeds and animal care products.

In the petroleum industry
Lin seed oil is used in the production of bio-diesel.

In the leather industry
Lin seed oil is used in the leather industry for leather treatment.

In the sports goods industry
Linseed oil is used in the maintenance of Cricket Bats, Baseball Bats, Hockey Sticks, Archery Equipment and Croquet Mallets. It is used by billiards/pool cue-makers cue shafts, in place of epoxy to seal modern wooden surfboards, to maintain skis to make them stay supple and flexible

Other industrial uses
It is used for making lubricants and sealants, by the fire department to treat the wood handles of hand tools that have metal implements to prevent buildup of static electricity, in wooden instruments, paddles and boats, carvings, and it is a traditional finish for gun stocks.

Safety Precautions
Linseed oil is highly flammable. As it evaporates, the oil can sometimes spontaneously combust, causing a fire. For this reason, cloths which have been used to apply Linseed oil should be allowed to dry flat outside before being discarded or washed; these cloths should also not be run through a dryer, as they may catch fire. Rags soaked in Linseed oil may self-ignite. Soak them in water and dispose them.

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