scratch test

For pieces of unknown purity, she performed a quick scratch test using an acid kit to help determine the metal’s karat composition.

“I went to see the allergist. Got the scratch test,” he reported.

An iodine-based scratch test or spectral analysis of leaves could indicate the presence of little cherry disease before it is exhibited in the fruit, Galimba said.

Wahlberg, 49, captioned the photo following an allergy scratch test while donning a mask at a doctor's office.

Dejneka nods, saying he had the same experience with that sample, and eagerly points to the exact spot on the counter where he did his scratch test last year.