公开(公告)号：US20220203749A1

公开(公告)日：2022-06-30

申请号：US17137516

申请日：2020-12-30

申请人： Xerox Corporation

发明人： Douglas K. HERRMANN ,  Chu-heng LIU ,  Seemit PRAHARAJ ,  Paul J. MCCONVILLE ,  Jason M. LEFEVRE ,  Michael J. LEVY

IPC分类号： B41N3/08 ,  B41F33/00 ,  B41F7/24

摘要： According to aspects of the embodiments, there is provided a method of measuring the amount of fountain solution employed in a digital offset lithography printing system. Fountain solution thickness is measured using a glass roll at a lower temperature than the fountain solution. The lower temperature causes the fountain solution to undergo a change in state and in a solid state the fountain solution crystalizes and changes roll opacity with the thickness of the film. When radiated with a light source the opacity is continuously measured through the surface of the roller. The thickness of the crystallized fountain solution can then be determined via the opacity level increase by the crystallization and the impact to the opacity on the glass roll.