CURL OF GUMMED FLAT PAPER

• This method describes a procedure for determining the degree of curl developed by a remoistenable gummed sheet when it is exposed to specified conditions of humidity.
• Measure the curl after approximately 15 h (or overnight) by determining the average height to the nearest3 mm (1/8 in.) of the two straightest parallel edges from the supporting plane if a forward curl, and the average height of the arch from the plane if a reverse curl.
• This test can be correlated with consumer acceptance or complaint. Based on the history of the sample, specifications as to acceptance or rejection can be established.

It Provides information on:

• Materials
• Test specimens
• Report