tannage

noun

1. (countable, uncountable)The act, operation, or result of tanning; a tanning.

   “They should have got his cheek fresh tannage / Such a day as to-day in the merry sunshine! / Had they stuck on his fist a rough-foot merlin!”

   “1938, US Depoartment of Agriculture, Technical Bulletin, Issues 551-575, page 36, After the layer tannage was completed, the crops and bellies from the 44 hides were reassembled and handled as a unit in each subsequent process until finished.”

   “With the exception of spruce bark, which cannot be considered to be a typical tannin, all the tannins give degrees of tannage in the neighbourhood of 50.”

   “2009, National Institute of Industrial Research Board Of Consultants & Engineers, Leather Processing & Tanning Technology Handbook, India, page 37, The possible combined tannages are numerous but are, in general, limited to the light leathers. Combination tannages are very ancient.”

2. (countable, uncountable)The act of steeping cast slabs of artificial marble in a solution of potash alum to harden it and make it insoluble.