English to Spanish Tech/Engineering Materials (Plastics, Ceramics, etc.) Technical

Hello,

What is the meaning of "pickle/ pickling" in the context of the production of leather:

"As is common in the art before tanning the hides are pickled.
Pickling makes the fibers of the hides more receptive to tanning.
Preferably in the method for producing leather the hides are pickled before tanning wherein pickling is contacting the hide with a pickling liquid comprising one or more acids and salt."

Thanks!