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absorbency test

a test carried out in a laboratory to test how absorbent a sample of paper is

COMMENT: Paper is a relatively absorbent substrate because there are pores in between the fibres and mineral particles. Liquids such as oil or water can be absorbed through these pores. Water absorbency and oil absorbency are quite different properties, and as most printing inks are oil-based, the printer is more concerned with the oil absorbency of paper than its water absorbency. Oil absorbency can be measured using the PIRA Surface Oil Absorbency Tester (SOAT), the K & N method or the IGT method.

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