Pulp and paper magazine of Canada . the sharper stones hasle trength than that from pulp ground on duller ones. In the tests conducted on stones sharpened so that thesurface consisted of deep ridges or points and grooves, itwas found that the quality of pulp produced was uniformly Figure 3 is a series of curves similar to those shown infigure 1, except that they were obtained at a speed of 225revolutions per minute instead of 175 revolutions. Thesame general characteristics appear in this series as in theother. It is again evident that the curves showing therelation between sharpness of stone
Pulp and paper magazine of Canada . the sharper stones hasle trength than that from pulp ground on duller ones. In the tests conducted on stones sharpened so that thesurface consisted of deep ridges or points and grooves, itwas found that the quality of pulp produced was uniformly Figure 3 is a series of curves similar to those shown infigure 1, except that they were obtained at a speed of 225revolutions per minute instead of 175 revolutions. Thesame general characteristics appear in this series as in theother. It is again evident that the curves showing therelation between sharpness of stone and power consumptionconverge at a point which has a value of approximately 50horsepower per ton, the sharpness of stone being somewhatgreater than the sharpest condition under which the testswere carried on. Figures E. and F. are a reproduction of the surfaces ofstone used in a number of tests. Figure E shows the sur-face before any grinding had been done, and figure F showsthe same surface after tons of pulp had been ground.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectpaperma, bookyear1903
