"Nonporous" Quotes from Famous Books
 ... grease or any other foreign matter present on the ridges, or the saline substance emitted by the glands through the ducts or pores which constitute their outlets. The background or medium may be paper, glass, porcelain, wood, cloth, wax, putty, silverware, or any smooth, nonporous material. ...
— The Science of Fingerprints - Classification and Uses • Federal Bureau of Investigation |
