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What is Cobb value of paper?
The COBB value indicates whether paper, paper board, or corrigated fiber board has the ability to absorb water. A high COBB value indicates the ability to absorb water, a low COBB value indicated resistance to absorbing water.
What is standard cobb value of kraft paper?
The standard Cobb value of kraft paper is typically around 60-70 g/m². This value represents the amount of water that the paper can absorb in a specific time frame and is an important measure of the paper's ability to withstand wet conditions.
How COBB value of kraft paper can you determine?
One can measure Cobb of kraft paper in lab following TAPPI T441 standard.
What is the unit of measurement of COBB value of Paper?
The COBB value of paper is typically measured in grams per square meter (g/m2). It represents the amount of water absorbed by a specific area of the paper surface in a standardized test, indicating the paper's resistance to liquid penetration.
How do you check Cobb value of paper?
The Cobb/sizing is comes under the MISCELLANEOUS PROPERTIES. If you do not want to use the old manual method. There do exists Automatic Cobb testers that also in addition to the static Cobb value for a given time, show you the dynamic Cobb value in a graph with time axis. It is for example many times, more relevant to see the water uptake after ten seconds and not after one minute.
What is the tolerance for Cobb value for absorption of paper?
The tolerance for Cobb value in the absorption of paper typically ranges from 10 to 30 g/m², depending on the type of paper and its intended use. The Cobb test measures the amount of water absorbed by paper over a specific time period, which helps assess its suitability for various applications, especially in packaging and printing. Higher Cobb values indicate greater water absorption, which may not be desirable for certain types of paper. Always refer to industry standards or specifications for specific tolerance levels.
What is the cobb value for 70 gsm white printing paper for water damping web offset machine?
The Cobb value for 70 gsm white printing paper used in a water damping web offset machine is typically around 25-30 g/m2. This value indicates the paper's ability to absorb water and is important for maintaining print quality during the offset printing process.
How do you calculate cobb value of paper?
The Cobb value of paper, often referred to in the context of its quality or performance, typically involves assessing factors like grammage, thickness, and moisture content. To calculate it, you can use the Cobb test, which measures the amount of water absorbed by a specific area of paper over a set time. The result is usually expressed in grams per square meter (g/m²). By evaluating these measurements, you can determine the paper's suitability for various applications, especially in packaging and printing.
Unit of cobb value?
No unit
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$11,000,000
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