Pulp, beating, [117]
—, bleaching, [110]
—, — refractory, [114]
—, colour of, produced by bisulphite, [77]
—, dimensions of fibre in, [119]
—, dry, preparing, [119]
—, duration of beating, [119]
—, freeing from bleach, [114]
—, improving colour, [114]
—, mixing, [119]