BS-3564-1986 ISO-67-1981.pdf
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1、BRITISH STANDARD BS 3564:1986 ISO 67:1981 Method for Size-grading of muscovite mica blocks, thins and films ISO title: Muscovite mica blocks, thins and films Grading by size UDC 621.315.613.1 + 679.867.7:622.741 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:36:07 GMT+00:00 2006, Uncontro
2、lled Copy, (c) BSI BS 3564:1986 This British Standard, having been prepared under the direction of the General Electrotechnical Engineering Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31 January 1986 BSI 12-1999 First published November 1962 Fi
3、rst revision January 1986 The following BSI references relate to the work on this standard: Committee reference GEL/16 Draft for comment 84/28849 DC ISBN 0 580 14939 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the General Eletrotechnic
4、al Engineering Standards Committee (GEL/-) to Technical Committee GEL/16, upon which the following bodies were represented: Adhesive Tape Manufacturers Association British Industrial Ceramic Manufacturers Association British Paper and Board Industry Federation (PIF) British Plastics Federation Briti
5、sh Telecommunications plc Department of Trade and Industry (British Calibration Service) ERA Technology Ltd. Electrical and Electronic Insulation Association (BEAMA Ltd.) Electrical Installation Equipment Manufacturers Association (BEAMA Ltd.) Electricity Supply Industry in England and Wales Electro
6、nic Engineering Association Ministry of Defence Rotating Electrical Machines Association (BEAMA Ltd.) Rubber and Plastics Research Association of Great Britain Telecommunication Engineering and Manufacturing Association (TEMA) Transmission and Distribution Association (BEAMA Ltd.) The following body
7、 was also represented in the drafting of the standard: Mica Trade Club Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:36:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3564:1986 BSI 12-1999i Contents Page Committees respo
8、nsibleInside front cover National forewordii 0Introduction1 1Scope and field of application1 2References1 3Definitions1 4Grading method2 5Trimming3 6Grading procedure4 7Tolerance4 Figure Grading chart for muscovite mica blocks, thins and films5 Table 1 Standard grading for muscovite mica blocks, thi
9、ns and films3 Table 2 Additional grades for thumb-trimmed mica4 Table 3 Additional grades for Madras rounds4 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:36:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3564:1986 ii BSI 12-1999 National forew
10、ord This revision of BS 3564 has been prepared under the direction of the General Eletrotechnical Engineering Standards Committee and supersedes BS 3564:1962 which is withdrawn. It is identical with ISO 67:1981 “Muscovite mica blocks, thins and films Grading by size” published by the International O
11、rganization for Standardization (ISO). Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention
12、 is drawn especially to the following. The comma has been used as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British S
13、tandard”. Where expressions such as “agreed between the interested parties” and “subject to agreement.” appear, e.g. in 3.12 and 5.3, this should be taken to indicate that the subject matter concerned is not inherently part of the requirements of the standard, but should be included in the purchase
14、contract. The Technical Committee has reviewed the provisions of ISO 444 to which reference is made in the text and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of Brit
15、ish Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardaCorresponding British Standard ISO 3:1973BS 2045:1965 Preferred numbers (Technically equivalent) ISO 2185
16、:1972BS 5804:1979 Method of visual classification for muscovite mica blocks, thins and films (Identical) a Undated in the text. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and a back cover. This standard has been u
17、pdated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:36:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3564:1986 BSI 12-19991 0 Introduction Muscovite
18、 mica constitutes one of the two principal types of mica, the other being phlogopite mica the grading of which is dealt with by ISO 444. For the corresponding complementary classification of muscovite mica according to visual quality, reference should be made to ISO 2185. 1 Scope and field of applic
19、ation This International Standard specifies a standard method for grading muscovite mica blocks, thins and films according to size. It also specifies trimming requirements and defines relevant terms used in the trade. 2 References ISO 444, Phlogopite mica blocks, thins and splittings Grading by size
20、. ISO 2185, Muscovite mica blocks, thins and films Visual classification. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 crude mica crude crystals or books, as extracted from the mine 3.2 cobbing the process of removing dirt and rock from crude mi
21、ca 3.3 rifting the process of splitting cobbed mica into sheets of suitable thicknesses 3.4 trimming; dressing the process of removing major flaws from rifted mica. Trimming may be accomplished with fingers, sickle or knife. Mica is then named after the implement used, sickle-trimmed mica, thumb-tri
22、mmed mica 3.5 sickle-trimmed mica crude mica cobbed, rifted and trimmed with a sickle to eliminate major flaws and left with an irregular outline and bevelled edges 3.6 knife-trimmed mica sickle-trimmed mica, further refined with a knife to eliminate interior defects and also such defects as may hav
23、e been overlooked by the sickle-cutter 3.7 thumb-trimmed mica rifted mica, trimmed with thumb and other fingers 3.8 full-trimmed mica rifted mica, trimmed on all sides, eliminating all cracks, reeves and cross-grains 3.9 half-trimmed mica rifted mica trimmed on two sides, with at least two-thirds of
24、 the pieces trimmed on two adjacent sides, and the balance of the pieces trimmed on the two parallel long sides, with no cracks extending into the area by which the piece is graded. The foregoing does not apply to sizes 06 and 16 (grades 6 and 5“), for which at least one of the two trimmed sides mus
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