Chemistry of pulp and paper making . B. F. Perkins & Son, (398) Fig. 46. Basis-weight ScaleCourtesy of Thwing Instrument Company THICKNESS 399 per 500 sheets is read off directly on the scale and no movementof weights is necessary. In the case of very small samples a piece of known areashould be weighed on a chemical balance and the ream weightcalculated by the following formula: (Wt. in grams) X () X (area of trade size desired)Area of sample in square inches= Weight on trade size desired. Thickness. The thickness of a paper may best be deter-mined by means of a spring micrometer h
Chemistry of pulp and paper making . B. F. Perkins & Son, (398) Fig. 46. Basis-weight ScaleCourtesy of Thwing Instrument Company THICKNESS 399 per 500 sheets is read off directly on the scale and no movementof weights is necessary. In the case of very small samples a piece of known areashould be weighed on a chemical balance and the ream weightcalculated by the following formula: (Wt. in grams) X () X (area of trade size desired)Area of sample in square inches= Weight on trade size desired. Thickness. The thickness of a paper may best be deter-mined by means of a spring micrometer having a hand that
Size: 1460px × 1710px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaperma, bookyear1920
