two Types of Copy Paper

 two types of copy paper

Size : 70 ,75,80GSM 8.5*11,A4,8.5*13,A3,11*17, and foolscap paper sheet is 17 x 13.5inches

(432x343 mm) .
Economy type:
- grammage: (80 +- 3) g/sm
- caliper: (106 +- 4) mm/1000
- stiffness L&W:
    MD min 100 mN
    CD min 40 mN
- roughness bendtsen: (200 +- 50) ml/min
- CIE whiteness: 146 +- 3
- brightness with UV: (103,5 +- 1,5) %
- opacity: min 90 %.
Allround type:
- grammage: (80 +- 3) g/sm
- caliper: (106 +- 3) mm/1000
- stiffness L&W:
    MD min (125 +- 15) mN
    CD min (60 +- 10) mN
- roughness bendtsen: (200 +- 50) ml/min
- CIE whiteness: 160 +- 3
- brightness with UV: (110 +- 1,5) %
- opacity: min 91 %.