in oil varnishes the role of oil is
Answers
Explanation:
Varnish is a clear transparent hard protective finish or film. Varnish has little or no color and has no added pigment as opposed to paint or wood stain which contains pigment. However, some varnish products are marketed as a combined stain and varnish. Varnish is primarily used in wood finishing applications where the natural tones and grains in the wood are intended to be visible. It is applied over wood stains as a final step to achieve a film for gloss and protection. Varnish finishes are usually glossy but may be designed to produce satin or semi-gloss sheens by the addition of "flatting" agents.
The term "varnish" refers to the finished appearance of the product. It is not a term for any single or specific chemical composition or formula. There are many different compositions that achieve a varnish effect when applied. A distinction between spirit-drying (and generally removable) "lacquers" and chemical-cure "varnishes" (generally thermosets containing "drying" oils) is common, but varnish is a broad term historically and the distinction is not strict.
In oil varnishes, the role of oil is to act as adequately good drying properties that have been refined and polymerized to a provided viscosity.
- Oil varnishes are readied according to several techniques. In some cases the resin is initially melted, oil is added, and the mixture is boiled down to the intended viscosity; in others, the resin is added to the hot oil. A solvent and desiccant are thereafter stirred into the varnish base generated by these processes. Oil varnishes are applied in the same way as paints and colors.
- Oil varnishes are utilized to cover metals and wood laminates and to breed electrical windings. They also fulfill as binders in the practice of pigmented paints and varnishes
- Oil varnishes solutions are set by the combination of vegetable oils and natural or artificial resins in organic solvents.
#SPJ2