Second Meeting of Drafting Group for National Standard Requirements and Test Methods for Printability of Coated Paper for Heatset Web Offset Printing Convened
On January 17, 2013, the National Printing Standardization Technical Committee held the second working meeting of the drafting group for the national standard 'Printability Requirements and Test Methods for Coated Paper for Thermoset Web Offset Printing' in Hefei, Anhui Province. More than 10 experts and technicians from organizations including Gold East Paper (Jiangsu) Co., Ltd., the Hefei Sino-German Printing Training Center, UPM China Co., Ltd., Tianjin Toyo Ink Co., Ltd., C&C Joint Printing (Guangdong) Co., Ltd., Hangzhou Dianzi University, Hunan Yueyang Paper Co., Ltd. and Beijing Shengtong Printing Co., Ltd. attended the meeting. Anhui Press and Publication Vocational and Technical School hosted the meeting.
The meeting carefully discussed and studied the terminology and technical content of the third draft of the drafting group's draft and put forward specific revision suggestions for the draft. For ease of use, the meeting defined 'lightweight coated paper' and 'art paper' in the standard and proposed a 'blister resistance' property for paper.
After analyzing the more than 11,000 test data items from the previous stage and referring to the content of relevant national standards for paper categories, the meeting decided to change 'cross-direction basis weight deviation' to 'cross-direction basis weight difference (basis weight uniformity)'; taking into account that the brightness (whiteness) index of art paper should meet the requirements of primary and secondary school textbooks as well as environmental protection requirements, the brightness (whiteness) values of both glossy and matte art paper were lowered to 85. The 'moisture content' value of paper was changed to '5.0±2.0', adjusting the central value and tolerance range of moisture content so as to meet printing enterprises' requirements for the stability of paper moisture content.
As for the disputed technical indicators such as 'chromaticity', 'gloss', 'ink absorbency', 'printing surface roughness', 'printing surface strength', 'folding endurance (cross direction)' and 'stretchability (cross-direction water immersion)', the specific data will continue to be determined by the relevant printing and papermaking enterprises through tests. The meeting decided that the fourth draft of the drafting group's draft would be completed before the end of May 2013, and that the third working meeting of the drafting group would be held in June 2013.
—This article is reprinted from China Packaging Network (pack.cn); original link: http://news.pack.cn/show-361971.html
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