Author:Weideman, E; Van der Walt, LTDate:Jan 1978The relative importance of various parameters such as temperature, concentration and treatment time on the chemical softening and bleaching of phormium fibre, has been investigated on a pilot scale.Read more
Author:Weideman, E; Van Rensburg, NJJDate:Feb 1982The effect of electroflotation using aluminium electrodes on the C.O.D., D.O.C and colour values of liquors containing acid, disperse, mordant and basic dyes in the presence and absence of wool grease was investigated.Read more
Author:Hunter, IM; Weideman, E; Wevers, HW; Veldsman, DPDate:Mar 1971The decision to convert SAWTRI to a National institute is an expression of confidence in the future of the research. The bulletin also contains the following: 1. A study of the variation in doubling twist of wool worsted hosiery yarns. 2. The ...Read more
Author:Weideman, EDate:Sep 1976The liquid diiodomethane has been used extensively for measuring contact angles on solids, and he values obtained are used for the calculation of the surface free energy of the solids.Read more
Author:Weideman, E; Van Rensburg, NJJDate:Nov 1976A brief review of the theory and literature on interfacial phenomena is given. A statistical analysis of published data has shown that the value obtained for Y (the surface free energy or surface tension of a solid), is dependent on the values ...Read more