Acid Test (gold)
An acid test is any qualitative chemical or metallurgical assay which uses acid; most commonly, and historically, the use of a strong acid to distinguish gold from base metals. Figuratively, acid test is any definitive test for some attribute, e.g. of a person's character, or of the performance of some product.
Read more about Acid Test (gold): Chemistry, Figurative Meanings
Famous quotes containing the word test:
“This, then, is the test we must set for ourselves; not to march alone but to march in such a way that others will wish to join us.”
—Hubert H. Humphrey (1911–1978)