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Table 4 Pulping results and strength properties of hand-sheets obtained from Abelmoschus esculentus okra stalks

From: Application of soda-AQ pulping to agricultural waste (okra stalks) from Sudan

Pulping Process   15% Soda-AQ 18% Soda-AQ 21% Soda-AQ
Pulping results
 Kappa number   29.6 27.8 22.2
 ISO brightness, %   19.6 20.4 22.3
 Viscosity, ml g−1   1010 1045 1065
Strength properties
 Initial pulp freeness, SR    
 Apparent density, g cm−3 25 0.52 0.61 0.61
50 0.62 0.65 0.67
 Breaking length, Km 25 7.5 8.1 8.1
50 8.1 8.3 8.5
 Tensile index, N m g−1 25 40.1 43.2 45.3
50 60.2 61.4 63.1
 Tear index,, m N m2 g−1 25 7.8 7.4 7.2
50 5.6 5.6 5.7
 Burst index, K Pa m2 g−1 25 2.2 2.1 2.3
50 3.6 3.9 3.7
 Folding endurance, log10n 25 06 0.9 0.9
50 1 1 1.1