Cobb value: The Cobb value is the mass of water a known area of paper absorbs in a set time, in grams per square metre. Lower means more water-resistant.
In more detail
A ring holds water against the paper surface for a fixed period (often 60 seconds); the sheet is weighed before and after.
Why it matters
Boxes in humid climates, cold chains or with water-based glues and inks behave better with a controlled Cobb value.
How it is measured or specified
Measured with a Cobb tester under a named standard and time. State which side of the paper is tested.
Questions
What is Cobb value?
The Cobb value is the mass of water a known area of paper absorbs in a set time, in grams per square metre. Lower means more water-resistant.
Why does Cobb value matter to buyers?
Boxes in humid climates, cold chains or with water-based glues and inks behave better with a controlled Cobb value.
Why does Cobb value matter?
Boxes in humid climates, cold chains or with water-based glues and inks behave better with a controlled Cobb value.
Explain Cobb value in more detail.
A ring holds water against the paper surface for a fixed period (often 60 seconds); the sheet is weighed before and after.
How is Cobb value measured or specified?
Measured with a Cobb tester under a named standard and time. State which side of the paper is tested.
What is GSM?
GSM is the weight of one square metre of paper or board in grams. It is the basic measure of how heavy, and roughly how strong and costly, a grade is.
What is Moisture content?
Moisture content is the percentage of water in paper or board by weight. It affects stiffness, cracking at creases and warp.
What does Bollant Industries make?
Recycled paper and board, industrial paper products such as cores and cones, corrugated and printed packaging, paper tableware, areca and sal leaf tableware, inks, adhesives and laminating films, and a small home and professional care range.