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Keywords: LeatherResearch 020.jpg To simulate a tropical environment the treated specimens of leather are kept in an oven at 30 degrees Celsius A small amount of water in the bottom of each specimen jar provides the necessary humidity National Institute of Standards and Technology 1956-01-01 National Institute of Standards and Technology PD-USGov-NIST PD-USGov National Bureau of Standards National Institute of Standards and Technology Leather Leather shoes |