Question 1

What is the Absorption Capacity of Cobb Water Absorption ISO 535?

Accepted Answer

Determination of the mass of water absorbed by a square metre of paper over a fixed time period quantifies the surface sizing efficiency. The cobb water absorption iso 535 value indicates how the material will behave when exposed to moisture during printing or storage. It applies to both sized paper and board but is not suitable for unsized or highly porous grades.

Question 2

What is the Testing Protocol of Cobb Water Absorption ISO 535?

Accepted Answer

A dry sample is weighed and then clamped under a metal cylinder which is filled with a specified depth of water. After the contact period ends, the excess water is removed with a heavy roller and blotting paper before the sample is weighed again. The difference in weight reveals the absorption rate.

Question 3

What is the Sizing Evaluation of Cobb Water Absorption ISO 535?

Accepted Answer

Resistance to liquid ingress is adjusted during the papermaking process by adding internal or surface sizing agents. A low cobb water absorption iso 535 result suggests a highly sized surface that repels water which is necessary for lithographic printing where dampening solutions are present. Excessive sizing can however prevent the proper anchorage of water based inks or adhesives. Proper control of this property ensures that corrugated boxes do not lose their structural integrity when stored in humid warehouses.

Cobb Water Absorption ISO 535

Absorption Capacity

Testing Protocol

Sizing Evaluation

Boundary Layer Condensation Dynamics in Enclosed Corrugated Board Cargo Units

Aqueous Dispersion Coating Chemistry Optimization for High Yield Mechanical Hydrapulping

Grade Substitution Shipped under an Unchanged Product Name

What the firm knows, published