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When used as a wood finish, linseed oil dries slowly and shrinks little upon hardening. A linseed oil finish is easily scratched and liquid water penetrates a linseed oil finish in mere minutes, and water vapour bypasses it almost completely. [6] Garden furniture treated with linseed oil may develop mildew. Oiled wood may be yellowish and is ...
Typically, softer/ thinner oils such as mineral oil will produce a glossier though less durable finish whereas harder/ more viscous oils such as walnut oil and olive oil will produce a more durable finish. Although boiled linseed oil is commonly used as a wood treatment, it is too viscous to use for French polishing [citation needed].
Linseed oil's properties as a polymer make it highly suitable for wood finishing, for use in oil paints, as a plasticizer and hardener in putty and in making linoleum. [179] When used in food or medicinally, linseed oil is called flaxseed oil. Poppyseed oil, similar in usage to linseed oil but with better color stability. [176]
The raw oil may be used, but it cures poorly and leaves a sticky surface. Normally boiled linseed oil is used. This has been prepared beforehand by boiling with lead, in the form of lead oxide, or with manganese salts. Modern boiled oils use a lead-free metallic drier added cold, such as cobalt resinate. Old linseed oil finishes yellow with age ...
Excellent hard finish Boiled linseed oil: Yellow warm glow, pops grain 1, darkens with age Low Low Relatively safe once cured, metallic driers are poisonous. Easy. Applied in thin coats with cloth or brush, excess wiped off. Cure time can be long. Difficult. All saturated wood needs to be removed (planing/sanding/scraping) Cures matte Tung oil
A drying oil is an oil that hardens to a tough, solid film after a period of exposure to air, at room temperature. The oil hardens through a chemical reaction in which the components crosslink (and hence polymerize ) by the action of oxygen (not through the evaporation of water or other solvents ).
Drying oil such as walnut oil or linseed oil may be used in combination with amber, copal, rosin or other resins. Traditionally the oil is prepared by cooking or exposure to air and sunlight, but modern stand oil is prepared by heating oil at high temperature without oxygen. The refined resin is sometimes available as a translucent solid and is ...
The oil is obtained by pressing, sometimes followed by solvent extraction. Owing to its polymer-forming properties, linseed oil is often blended with combinations of other oils, resins or solvents as an impregnator, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and hardener in putty, and in ...
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