Question

Which of the following glasses are not prepared by Pressing?

• A. Dishes
• B. Tumblers
• C. Bottles
• D. TV picture tubes

Hint:

Pressing is suitable for open glass articles like dishes. Bottles are hollow articles and are generally made by blowing processes.

Answer 1

The Correct Option is C

Pressing is a glass forming process. In pressing, a measured quantity of molten glass is placed into a mould. A plunger presses the glass into the required shape. This method is suitable for products having relatively simple and open shapes. Examples include dishes, plates, bowls, and some special glass parts. TV picture tubes can also involve pressing operations for certain parts. Bottles, however, are hollow narrow-neck glass containers. They are generally prepared by blowing or blow-and-blow press-and-blow methods, not by simple pressing alone. Since bottles require hollow internal shape and neck formation, they are not prepared by ordinary pressing. Therefore, the glass article not prepared by pressing is: \[ \text{Bottles}. \]