Bubble

Bubble

Description

A spherical void filled with air or gas. Bubbles form as air is trapped in a liquid. When a plastic cures or hardens, bubbles can form permanent voids that interfere with optical clarity. Sometimes bubbles are purposely injected into a liquid or plastic, such as for the formation of foams.

Authority

• Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988

• Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997

• The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998