placed inwaterproof bags and kept in a water bath at 10 C for at least 4 h for temperature stabilisation. The test speed was 100 mm per min, and samples were compressed to 40% of their original height, repeated within 5 s.
placed inwaterproof bags and kept in awater bath at 10 C for at least 4 h for temperature stabilisation. Thetest speed was 100 mm per min, and samples were compressed to40% of their original height, repeated within 5 s.