1. Trang chủ
  2. » Kỹ Thuật - Công Nghệ

Bsi bs en 12877 4 2000

8 3 0

Đang tải... (xem toàn văn)

THÔNG TIN TÀI LIỆU

/home/gencode/cen/w12877p4/12877p4 1 12811 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |[.]

BRITISH STANDARD Colouring materials in plastics Ð Determination of colour stability to heat during processing of colouring materials in plastics Ð Part 4: Determination by two-roll milling The European Standard EN 12877-4:1999 has the status of a British Standard ICS 83.040.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BS EN 12877-4:2000 BS EN 12877-4:2000 National foreword This British Standard is the English language version of EN 12977-4:1999 The UK participation in its preparation was entrusted to Technical Committee STI/1, Pigments, which has the responsibility to: Ð aid enquirers to understand the text; Ð present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; Ð monitor related international and European developments and promulgate them in the UK A list of organizations represented on this committee can be obtained on request to its secretary Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ªInternational Standards Correspondence Indexº, or by using the ªFindº facility of the BSI Standards Electronic Catalogue A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages to 4, an inside back cover and a back cover The BSI copyright notice displayed in this document indicates when the document was last issued This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 January 2000  BSI 01-2000 ISBN 580 35857 Amendments issued since publication Amd No Date Comments (1 (8523($167$1'$5' 1250((8523e(11( (8523b,6&+(1250 2FWREHU ,&6 (QJOLVKYHUVLRQ &RORXULQJPDWHULDOVLQSODVWLFV'HWHUPLQDWLRQRIFRORXUVWDELOLW\ WRKHDWGXULQJSURFHVVLQJRIFRORXULQJPDWHULDOVLQSODVWLFV 3DUW'HWHUPLQDWLRQE\WZRUROOPLOOLQJ 0DWLqUHVFRORUDQWHVGDQVOHVSODVWLTXHV'pWHUPLQDWLRQGH ODVWDELOLWpGHODFRXOHXUjODFKDOHXUDXFRXUVGHODPLVHHQ RHXYUHGHVPDWLqUHVFRORUDQWHVGDQVOHVSODVWLTXHV 3DUWLH'pWHUPLQDWLRQSDUFDODQGUDJHVXUELF\OLQGUH )DUEPLWWHOLQ.XQVWVWRIIHQ%HVWLPPXQJGHU%HVWl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e (8523e(1 '( 1250$/,6$7,21 (8523b,6&+(6 20,7(( )h5 125081* &HQWUDO6HFUHWDULDWUXHGH6WDVVDUW%%UXVVHOV ‹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‹%6, 3DJH (1 $SSDUDWXV /DERUDWRU\ WZR UROOPLOO ZLWK IDFLOLW\ IRU KHDWLQJ 7KH VSDFLQJ RI WKH UROOHUV VKDOO EH DGMXVWDEOH DQG WKH GLDPHWHURIWKHUROOHUVVKRXOGEHEHWZHHQPPDQGPP VHH1RWH 7KHUDWLRRIWKHURWDWLRQDOVSHHGVRIWKH WZRUROOHUV IULFWLRQUDWLR VKDOOEHDGMXVWDEOHDQGWKHURWDWLRQDOVSHHGVKDOOEH “ PLQ7KHUDWLREHDGGLDPHWHU +N EDQN WRJDSZLGWK+VVKRXOGEH+N+V˜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“ •&DJDSZLGWKRIPPWRPPDQGD WRWDOPLOOLQJWLPHRIPLQLQFOXGLQJSODVWLILFDWLRQ&XWDQGIROGWKHVKHHWUHSHDWHGO\WRDFKLHYHDGHTXDWHGLVSHUVLRQRI WKHFRORXULQJPDWHULDO7DNHDVDPSOHIURPRQHRIWKHVKHHWVDQGSUHSDUHDWHVWVSHFLPHQIURPLWE\KHDWSUHVVLQJDW •&IRUPLQIRUXVHDVDUHIHUHQFHVSHFLPHQ 6HWWKHUROOVXUIDFHWHPSHUDWXUHVIRU39&SWREHWZHHQ•&DQG•&DQGIRU39&XWREHWZHHQ•&DQG•& 3URFHVVDVXIILFLHQWQXPEHURIVKHHWVVRWKDWWKHUHFRPPHQGHGPLQLPXPEHDGGLDPHWHULVDFKLHYHG VHH ZKLOVW VHWWLQJWKHUROOHUJDSWRSURGXFHDVKHHWRIXQLIRUPWKLFNQHVVRIDERXWPP6WDUWWLPLQJDQGPLOOWKHPDWHULDOOLPLWLQJ WKHZLGWKRIWKHVKHHWE\IUHTXHQWFXWWLQJWRRQHKDOIDQGE\UHYHUVDODQGODWHUDOUROOLQJWRSUHYHQWWKHPDWHULDOIURP UXQQLQJXSRQWRWKHUROOJXLGHV ‹%6, 3DJH (1 7DNHVDPSOHVDIWHUPLQDQGPLQPLOOLQJWLPH$IWHUDIXUWKHUSHULRGRIPLQ WRWDOWHVWSHULRGPLQ GUDZRII WKH PLOO VKHHW DQG WDNH D IXUWKHU VDPSOH 3UHSDUH WHVW VSHFLPHQV IURP HDFK VDPSOH E\ KHDW SUHVVLQJ DW  •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‹%6, blank BS EN 12877-4:2000 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI Ð British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover Tel: 020 8996 9000 Fax: 020 8996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services Tel: 020 8996 9001 Fax: 020 8996 7001 In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service Various BSI electronic information services are also available which give details on all its products and services Contact the Information Centre Tel: 020 8996 7111 Fax: 020 8996 7048 Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details of these and other benefits contact Membership Administration Tel: 020 8996 7002 Fax: 020 8996 7001 Copyright Copyright subsists in all BSI publications BSI also holds the copyright, in the UK, of the publications of the international standardization bodies Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means ± electronic, photocopying, recording or otherwise ± without prior written permission from BSI This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained If permission is granted, the terms may include royalty payments or a licensing agreement Details and advice can be obtained from the Copyright Manager Tel: 020 8996 7070

Ngày đăng: 14/04/2023, 00:53

Xem thêm:

TÀI LIỆU CÙNG NGƯỜI DÙNG

TÀI LIỆU LIÊN QUAN