Question

opacity is enhanced by adding
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Answer 1

Answer:

Opacity is the result of light scattering in many directions when the path of light is bent. This occurs as light goes from material of one index of refraction to a material with a different index of refraction. ... As refining increases fiber-to-fiber bonding and leads to a denser sheet, increased refining lowers opacity.

Explanation:

Answer 2

Opacity is enhanced by adding pigments and binding fillers.

• ​A material's optical property related to the refractive index is called opacity (n). The refractive index is a gauge of a material's capacity to bend or refract light as it passes through it. The pigment particles in a coating scatter and/or absorb light to the point where it cannot reach the substrate when the coating is opaque.
• The more opaque a pigment makes a coating, the higher its refractive index is. The coating film appears opaque and vibrant because the pigment scatters light before it reaches the underlying substrate.
• For instance, the very high refractive indices of 2.7 (Rutile) and 2.54 for titanium dioxide (Anatase). It is the most popular white pigment used to give paints opacity and whiteness.

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