CPC D21F 7/003 (2013.01) [D21F 5/181 (2013.01); D21F 7/12 (2013.01); D21F 11/14 (2013.01); D21G 9/0036 (2013.01); D21H 27/002 (2013.01); G01N 33/34 (2013.01)] | 9 Claims |
1. A method for determining the dryness of a fibrous web or a tissue web during the production of the fibrous web in a machine, the method comprising the following steps:
providing a machine including a drying cylinder or Yankee cylinder, at least one dryer hood associated with the drying cylinder, and a reel-up for winding up the fibrous web; and
determining the dryness of the fibrous web before the drying cylinder based on measured values describing the following variables:
a) an amount of solids in the fibrous web at the reel-up;
b) an amount of water in the fibrous web at the reel-up; and
c) an amount of water evaporated in the at least one dryer hood.
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