CALCULATION FOR REAM WEIGHT OF PAPER/PAPERBOARD IN SHEETS
1. To find the weight (in kilograms) of a ream containing 500 sheets of a given size
and gram weight.
Length (in Inches) x Width ( in Inches) x Gram Weight
_____________________________________________
3100 2. To find the weight (in Kilograms) of a ream containing 500 sheets of a given size
in Centimeters and Gram Weight. Length (In Centimeters) x Width (in Centimeters) x Gram weight
____________________________________________________
20000
3. To find the gram weight of a ream containing 500 sheets of given size in inches and weight in kilogram
Weight (in Kgs.) per ream x 3100
_____________________________
Length (in inches) x Width (in inches) 4. To find the gram weight of a ream containing 500 sheets of a given size in Centimeters and weight in kilogram. Weight (in Kgs.) per ream x 20000
____________________________
Length (in cms.) x Width (in cms.) 5. To find the total weight (in kilograms) of a reel of a given size, length and gram weight. Gram Weight x Width (in cms) of reel x Length in meter
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100000 6. To find the length in meter of a reel of a given size, gram weight and total weight in kilograms. Weight of reel (in Kgs.) x 100000
___________________________
Gram weight x width (in cms) 7. To find the weight per ream of 480 sheets if the weight per ream in given for 500 sheets.
Multiply the given weight by 0.96 CALCULATION FOR PAPER/PAPER BOARD IN REELS 1. To calculate the total length of paper in a reel in meters where the net weight of the paper in Kilograms, the reel width in centimeters and the substance of the paper in grams per square meter is known. Weight of reel in Kgs. x 100000
Length of paper in meters = ________________________________
Reel width in cms x grams per sq. meter FOR EXAMPLE: The Length of paper of substance 100 gsm in a reel of 75 cms width and weighing 150 Kgs. 150 x 100000
___________ = 2000 meters
75 x 100 2. To calculate the weight of a reel of paper in kilograms where the substance of the paper in grams per square meter, the total length of the paper in meter and the reel width is known. Weight of reel in kgs. x 100000
Substance in gsm = __________________________________
Length of paper in meter x reel width in cms. FOR EXAMPLE: The substance of paper in a reel of 250 cm width and which weighs 200 kgs and contain a total length of 1000 meters of paper. 200 x 100000
______________________ = 80 gsm
1000 x 250
4. To calculate the approximate number of sheets of a particular size which may be obtained from a reel of paper, the net weight of the reel and the substance of the paper being knowm and the width of the reel also being equal to or exact multiple of the dimension of one side of the sheet.
No. of sheets = Weight of reel in ks x 10000000
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gsm x Breadth of the sheet in cms x Length of sheet in cms.
FOR EXAMPLE:
Approximate number of sheets of size 51 x 76 cms to be obtained from a reel of paper in 60 gsm substance and having a reel width of 255 cms and weighing 175 kgs. 175 x 10000000
_____________________ = 7524 sheets
60 x 51 x 76
5. To find the approximate number of sheets of two different sizes to be obtained from a reel, the sizes filling the complete Machine Deckle ( Trimmed).
First the proportion of the deckle utilized to obtain the two different sizes is to be found out and consequently the proportion of the weights of the reel to get the two sizes equivalent to the above proportion of the reel utilized to get the two sizes is obtained and the approximate number of sheets for each side is then calculated from the previous formula no.4, the substance of the paper being known. FOR EXAMPLE: To fill a deckle of 188 cms of a reel of paper of 80 gsm substance cut in to proportion of 2 x 56 cms and 1 x 75 cms to obtain the paper of two different sizes of 56 x 91 cms and 76 x 102 cms. Find out the approximate number of sheets of the two sizes obtained by cutting the reels in to sheets, the weight of the reel being 376 kgs. Portions of the deckle utilized for the sizes 56 x 91 cms and 76 x 102 cms are respectively. 2 x 56 1 x 76
_____ and _____
188 188 Therefore weight of the portion of the reel utilized for size 56 x 91 cms is 376 x 2 x 56
____________ = 224 kgs.
188 and the weight of the portion of the reel utilized for the sie 76 x 102 is 376 x 1 x 76
_____________ = 152 kgs.
188
Approximate number of sheets for the size 56 x 91 cms
224 x 10000000
_____________ = 5494 sheets
80 x 56 x 91 Approximate numner of sheets for size 76 x 102 cms. 152 x 10000000
_____________ = 2450 sheets
80 x 76 x 102
N.B. For any specifications given in inches, first we should convert in to cms by multiplying by 2.54 for getting the correct result.
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