catflap.org Online Dictionary Query

  tan penetration /tˈan pˌɛnɪtɹˈeɪʃən/
  Durchgerben, Durchgerbung
     Synonyms: full tan penetration, leathering
  
   see: tanning, tannage, alum tanning, alum tannage, tawing, aldehyde tanning, aldehyde tannage, liquor tanning, liquor tannage, quinone tanning, quinone tannage, chrome tanning, chrome tannage, chroming, Dongola tanning, Dongola tannage, iron tanning, iron tannage, extract tanning, extract tannage, drum tanning, drum tannage, currying, dressing, finishing, oil tanning, oil tannage, chamois tanning, chamois tannage, chamoising, glacé tanning, glacé tannage, pit tanning, pit tannage, formaldehyde tanning, formaldehyde tannage, filling tanning, filling tannage, plumping tanning, plumping tannage, bark tanning, bark tannage, barking, mineral tanning, mineral tannage, vegetable tanning, vegetable tannage, accelerated tanning, accelerated tannage