Question

Read the given table and answer the questions.

Material Medium	Refractive Index	Material Medium	Refractive Index
Air	\[1.0003\]	Turpentine oil	$1.47$
Kerosene	$1.44$	Glass	$1.50$
Water	$1.33$	Ice	$1.31$
Diamond	$2.42$	Fused Quartz	$1.46$

Write the name of the material used in mixing colour paints to make shine and easy to brush.

Answer 1

Hint: For washing of brushes use turpentine to dilute the ink, mineral spirits. Turpentine makes it easy to reach the skin deeper, helps to blend in the tube more quickly as the colour is pigmented by artists. Mineral spirits are most generally seen as well as price is a safer offer. The efficiency of the solvent in paint is somewhat different. The turpentine is best borne on the brush. Goes easier for brushing and blending paint with less effort. 

Complete step by step answer:
Turpentine is a fluid formed by the distillation of resin from live trees, primarily pines (which is known also as spirit from turpentine, turpentine oil, wood turpentine, and terebenthine and (colloquially). It is used primarily as a solvent and as a source of organic synthesis products.
Turpentine is a pine needle family oleoresin. Resin turpentine, a natural oil-containing resin, is a yellowish and invisible mass of turpentine distillates, the latter of which is a toxic liquid without colour. Has an extraordinary odour. One of the oils that are used to dilute oil paints which are reactive and soluble in oil paints from pine wood. For contemporary painters, it is an invaluable material.
The oil paint is thinned by turpentine. In general it makes a consistency of watery type if you are using huge volumes of turpentine in oils paint. Turpentine improves the oil paint drying process. It takes weeks to dry up, but it is amazing for turpentine.
Therefore Turpentine Oil is the correct answer

Note: Medicinal turpentine is of the highest consistency. When the oil painter sketches the contours and tries to paint the underneath pigment, he is generally used to paint a great deal of turpentine. For contemporary painters, it is an invaluable material.