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Establishment of Absorption Capacity Evaluation Method for Watercolor Paper
Received:December 30, 2021  
DOI：10.11980/j.issn.0254-508X.2022.06.008
Key Words:watercolor paper  absorption capacity  Cobb value  contact angle  dynamic permeability
Author NameAffiliationPostcode
SHI Liming* Baoding Huarong Paper Mill Co.， Ltd.， Baoding， Hebei Province， 071000 071000
LI Zheng* China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
WAN Ying China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
DU Qi China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
LIU Wen China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
YANG Yang China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
MAO Zongjiu China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
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Abstract:In this study， 7 different absorption detection methods were used to detect and analyzed 6 samples of watercolor paper with different absorption capacity， and a set of detection methods suitable for determining the absorption capacity of watercolor paper were established. The results showed that all of ink line method， liquid penetration method， surface absorbance and Hercules sizing tester were not suitable for testing the absorption capacity of watercolor paper. The absorption capacity of watercolor paper could be evaluated synthetically by Cobb method， contact angle method and dynamic permeability method. When the Cobb （60） value of paper was in the range of （20±4）g/m2， the contact angle should change little within 30 min， and the permeability rate expressed by dynamic permeability curve of 1200 s should be fast.
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