Question
Download Solution PDFFrench polish is a type of _________, which is used to hide the grain defects on hardwood substances.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Varnish: Varnish is nearly homogenous solution of resins in oil, alcohol or turpentine. Type of solvent used depends upon the type of resin used.
French Polish: It is a type of spirit varnish prepared by dissolving resin in Methylate spirit at room temperature for use on hardwood substance to hide the grain defects. The surface is made smooth by rubbing.
Wax Polish: It consists of bees wax dissolved in turpentine and is used for highlighting the grain over wooden surfaces. The polish is rubbed over the surface with rag until a bright appearance is obtained.
Varnishes are classified as follows-
1.Oil Varnish – uses linseed oil and takes 24 hours to dry. It is suitable both for interior and external works.
2. Spar Varnish – Derives its name from its use on spars and other parts of ships. It gives sticky effect in warm weather and is not used indoors.
3. Flat Varnish – Materials such as wax, metallic soap or finally divided silica when added to varnish produce a dull appearance on drying known as flat varnish.
4. Spirit varnish – it is resin dissolved in spirit. The examples are French polish, lacquer and shellac varnish. It dries very quickly.
5. Asphalt varnish–it is made by dissolving melted had asphalt in linseed oil with a thinner such as turpentine or petroleum spirit. It is used over shop fabricated steel works.
Last updated on May 28, 2025
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