Traditional dyes used for Anatolian carpets are obtained from plants, insects and minerals. In 1856, the English chemist William Henry Perkin invented the first aniline dye, mauveine. A variety of other synthetic dyes were invented thereafter. Cheap, readily prepared and easy to use as they were compared to natural dyes, their use is documented in Ushak carpets already by the mid 1860s. The tradition of natural dyeing was recently revived, based on chemical analyses of natural dyes from antique wool samples, and experimental re-creation of dyeing recipes and processes, in the early 1980s.