European Standard EN ISO 105-Z07:1997 has the status of a British Standard ICS 59.080.01BSENISO 105-Z07:1998 This British Standard, having been prepar
牙科材料 色稳定性的测定Tag内容描述：
1、European Standard EN ISO 105-Z07:1997 has the status of a British Standard ICS 59.080.01BSENISO 105-Z07:1998 This British Standard, having been prepared under the directionof the Sector Board forMasterials and Chemicals, waspublished under the authorityof the Standards Boardand comes into effect on 15 January 1998 BSI 04-1999 ISBN 0 580 29451 X National foreword This British Standard is the English language version of ENISO 105-Z07:1997. It is identical with ISO105-Z07:1995. The UK partic。
2、 J883 has been reaffirmed to comply with the SAE five-year review policy. _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement ar。
3、 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN ISO 7491:2000 The European Standard EN ISO 7491:2000 has the status of a British Standard ICS 11.060.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Dental materials Determination of colour stabilityThis British Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of the Standards Committee and comes into eff。
4、itish Standard ICs 11.060.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGRT LAW BS EN IS0 7491:2000 STD-BSI BS EN IS0 74SL-ENGL 2000 3624bb7 088257b 75T BS EN IS0 7491:2000 been prepared under the Environment Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 December 2000 direction of the Health and Amd.No. Date O BSI 12-2000 ISBN O 580 36612 X National foreword Comments This British Standard is the official English lan。
5、 (ISO 7491:1985, IDT) 2013 ISO 7491 2012 ISO 74912012 II , 1.092 . 1.22009 . , 。
6、2008IS0 7491：2000本标准等同采用ISO 7491：2000牙科材料色稳定性的测定。
色稳定性是牙科材料重要的性能之一，本标准的试验方法可在其他标准中被引用。
本标准根据ISO 7491：2000重新起草。
本标准与ISO 7491：2000的主要差异和原因如下：删除“规范性引用文件”中“ISO 3696：1987”。
并在本标准中以“蒸馏水或去离子水”替代“ISO 3696：1987”中被引用的“2级水”。
因技术上是可行的。
311发光源“在试样上的照度为150 000 lx，试样的整个表面在任何时候照度都不应偏离平均值的10”。
改为“在试样上的照度达150 000 lx+150 00 1x”提高可操作性。
323色泽比较，国际标准中规定南北向漫射日光。
我国处于北半球，本标准选择了国际标准中的北向漫射日光。
与ISO 7491：2000的技术性差异已编入正文中，并在它们所涉及的章条的页边空白处用垂直单线标识。
本标准由国家药品监督管理局提出。
本标准由全国口腔材料和器械设备标准化技术委员会归口。
本标准由国家药品监督管理局北大医疗器械质量监督检。
