Question

The formation of dull patches on finished polished surface is

• A. Grinning
• B. Saponification
• C. Fading
• D. Bloom

Hint:

To avoid bloom, ensure proper ventilation and control temperature and humidity levels when applying finishes.

Answer 1

The Correct Option is D

Bloom refers to the appearance of dull, white patches on a polished surface, often caused by moisture or chemical reactions between the surface and its environment.
This defect is common in finishes such as varnishes or lacquers, which are often used on furniture, wooden surfaces, and even some decorative items. The cause of bloom is typically moisture that gets trapped within the coating layer, leading to a cloudy or dull appearance on the surface.
Bloom can also occur due to temperature fluctuations or high humidity, which can cause the applied finish to react with the air or contaminants. Once the moisture evaporates, it can leave behind a milky, uneven patch.
While bloom may not damage the material underneath, it ruins the aesthetic quality of the surface. Regular maintenance and careful control of the environment during application can help minimize this defect.