A.draw up, contract, of the effect of astringents, δριμέα . . ὥστε ἀποστύφειν arist.Pr.863a18, cf. Thphr.CP2.8.1; χείλεα ἀ. screw them up,AP7.536 (Alc.):—Pass., pf., “οὖρα δ᾽ ἀπέστυπται” are stopped, Nic.Th.433.
2. of preparing tissues for dyes, mordant, PHolm.9.14.