SANS 2813-1994 Paints and varnishes - Determination of specular gloss of non-metallic paint films at 20 60 and 85《油漆及清漆 20、60和85非金属漆膜镜面光泽的测定》.pdf

《SANS 2813-1994 Paints and varnishes - Determination of specular gloss of non-metallic paint films at 20 60 and 85《油漆及清漆 20、60和85非金属漆膜镜面光泽的测定》.pdf》由会员分享，可在线阅读，更多相关《SANS 2813-1994 Paints and varnishes - Determination of specular gloss of non-metallic paint films at 20 60 and 85《油漆及清漆 20、60和85非金属漆膜镜面光泽的测定》.pdf（15页珍藏版）》请在麦多课文档分享上搜索。

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-19915-9 SANS 2813:1994Edition 2, ISO tech corr. 1 and nat. amdt 1ISO 2813:1994Edition 3 and tech corr. 1Any reference to SABS ISO 2813 is

4、deemedto be a reference to this standard(Government Notice No. 1373 of 8 November 2002)SOUTH AFRICAN NATIONAL STANDARD Paints and varnishes Determination of specular gloss of non-metallic paint films at 20, 60 and 85 This national standard is the identical implementation of ISO 2813:1994 and technic

5、al corrigendum 1, and is adopted with the permission of the International Organization for Standardization. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South

6、Africa SANS 2813:1994 Edition 2, ISO tech corr. 1 and nat. amdt 1 ISO 2813:1994 Edition 3 and tech corr. 1 Table of changes Change No. Date Scope ISO tech corr. 1 1997 Changed to reduce the source image aperture tolerances and to introduce the quartz wedge as primary standard. Nat. amdt 1 2007 Amend

7、ed to change the designation from SABS to SANS, with no technical changes. National foreword This South African standard was approved by National Committee StanSA SC 5140.11I, Paints and varnishes Test methods, in accordance with procedures of Standards South Africa, in compliance with annex 3 of th

8、e WTO/TBT agreement. This document was published in July 2007. This SANS document supersedes SABS ISO 2813:1994 (edition 2 as modified by ISO tech corr. 1:1997). The text of the ISO document is reproduced unaltered, including irregular page numbering. INTERNATIONAL STANDARD IS0 2813:1994 TECHNICAL C

9、ORRIGENDUM 1 s+L+E Published 1997-02-l 5 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MEWYHAPOJIHAfl OPTAHM3ALWl IlO CTAHW4PTM3ALJMM. ORGANISATION INTERNATIONALE DE NORMALISATION . Paints and varnishes - Determination of specular gloss of non-metallic paint films at 20, 60 and 85” TECHNICAL CORR

10、IGENDUM 1 Peintures et vernis - &termination de la kflexion sp&ulaire de feuils de peinture non m6tallis6e & ZOO, 60 et 85” RECTIFICATIF TECHNIQUE I Technical Corrigendum 1 to International Standard IS0 2813A994 was prepared by Technical Committee lSO/TC 35, Paints and varnishes, Subcommittee SC 9,

11、General test methods for paints and varnishes. To improve the repeatability and reproducibility of specular-gloss measurements, IS0 2813 should be corrected by reducing the source image aperture tolerances (table 1) and introducing the quartz wedge as primary reference standard (subclause 54.1). The

12、 changes are underlined. Table 1 - Angles and relative dimensions of source image and receptor aperture In plane of measurement 1) Perpendicular to plane of measurement Parameter angle 02) 2 tan a/2 relative dimension angle $1 2 tan a/2 relative dimension I Source image ape.rture 0,75O + 0*1 0,013 1

13、 + 0.001 8 0,171 + 0.023 2,5“ kO.1“ 0,043 6 k 0.001 8 0,568 + 0.023 I I I I I I I I ICS 87.040.00 Ref. No. IS0 2813:1994/or.l:1997(E) Descriptors: paints, paint coats, films, tests, optical tests, measurement, gloss, specular reflection. 0 IS0 1997 Printed in Switzerland SANS 2813:1994This s tandard

14、 may only be used and printed by approved subscription and freemailing clients of the SABS .IS0 2813:1994/Cor.l:1997(E) IS0 5.4 Reference standards 5.4.1 Primary reference standard The primary reference standard shall be highly polished quartz alass or black glass, the top surface being plane to . w

15、ithin two fringes per centimetre, as measured by optical-interference methods. NOTE 8 It is not intended that the primary reference standards be used for daily calibration of glossmeters. Glass with a refractive index, measured at a wavelength of 587,6 nm, of 1,567 shall be assigned the specular-glo

16、ss value of 100. If glass of this refractive index is not-available, a correction is needed. Values of specular gloss for polished ouartz olass and black glass of various refractive indices at the three angles of incidence are given in table 2. The primary standard shall be checked at least every tw

17、o years because of the possibility of ageing. This is esneciallv applicable for black olass. In the event of degradation, the original gloss can be restored by optical polishing with cerium oxide. NOTES 9 The most readily available glass of the required planarity is now manufactured by the “float” p

18、rocess. This glass is unsuitable for use as a primary reference standard because the refractive index of the bulk of the glass differs from that of the surface. It is preferable to use an optically plane glass made by some other process, or to remove the surface of the float glass and repolish to op

19、tical planarity. IO The refractive index should preferably be determined by means of an Abbe refractometer. 11 If refract the :ive i absol ndex ute reflectance of the standard of the in the reference primary equation standard is required, the Fresnel equation may be used, inserting the SANS 2813:199

20、4This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 2813:1994This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 2813:1994This s tandard may only be used and printed by approved sub

21、scription and freemailing clients of the SABS .SANS 2813:1994This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 2813:1994This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 2813:199

22、4This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 2813:1994This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 2813:1994This s tandard may only be used and printed by approved sub

23、scription and freemailing clients of the SABS .SANS 2813:1994This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 2813:1994This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . Standards South AfricaSANS 2813:1994This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .