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SURFACE WETTABILITY OF PAPER (ANGLE OF CONTACT METHOD)
Product Details
Paper, Paperboard, Sized papers, Writing papers, Contact angle, Wettability, Projection, Printability, Feathering
- In this method ( 1-3 ) , the contact angle between air and liquid on a paper surface is taken as a measure of the resistance of the paper surface to wetting by the liquid.
- The ruling and writing qualities of paper are of importance for papers intended for drafting and writing. These papers must accept ink (ruling quality) without feathering (writing quality) . Certain ranges of contact angle are reportedly indicative of these qualities.
- The range of contact angles for specific conditions is small; consequently, careful testing technique is required as is indicated by the above examples.
- Sample the paper in accordance with TAPPI T 400 “Sampling and Accepting a Single Lot of Paper, Paperboard, Containerboard , or Related Product .” Be careful not to touch the areas to be tested, or contaminate them in any other way.
It Provides information on:
- Reagents
- Sampling and test specimens
- Calculation
- Precision
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