Concept:
French Polish is a traditional wood finishing technique widely used in furniture making, wood carving, decorative arts, and restoration work. It creates a smooth, glossy, and highly polished surface on wood.
Step 1:
French Polish is prepared mainly by dissolving:
• Shellac
• Alcohol (usually methylated spirit)
Shellac is a natural resin secreted by the lac insect. When mixed with alcohol, it forms a liquid polish that can be applied in thin layers over wooden surfaces.
Step 2:
French polish is used to:
• Protect wooden surfaces
• Enhance natural wood grain
• Provide smooth glossy finish
• Improve aesthetic appearance
It is especially popular in fine furniture and artistic woodwork.
Step 3:
Option (1): Dense Plaster mix
Plaster mixtures are used in mould making and construction, not in polishing wood.
Option (3): Oil colour mix with turpentine
This mixture is related to painting mediums and thinning oil paints, not French polishing.
Option (4): Application of Polyester resin
Polyester resin is used in fibre-glass work and industrial coating, not in traditional French polish preparation.
Step 4:
Since French polish is made from shellac dissolved in alcohol, the correct answer is:
\[
\boxed{\text{(2) Mixture of Shellac with alcohol}}
\]