1、BRITISH STANDARD BS ISO/IEC 15457-2:2007 Identification cards Thin flexible cards Part 2: Magnetic recording technique ICS 35.240.15 BS ISO/IEC 15457-2:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2007 BSI 2007 ISBN 978 0 5
2、80 56125 2 National foreword This British Standard is the UK implementation of ISO/IEC 15457-2:2007. It supersedes BS ISO/IEC 15457-2:2001 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee IST/17, Cards and personal identification. A list of organizatio
3、ns represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.
4、Amendments issued since publication Amd. No. Date Comments Reference number ISO/IEC 15457-2:2007(E)INTERNATIONAL STANDARD ISO/IEC 15457-2 Second edition 2007-06-15 Identification cards Thin flexible cards Part 2: Magnetic recording technique Cartes didentification Cartes flexibles fines Partie 2: Te
5、chniques denregistrement magntique BS ISO/IEC 15457-2:2007ii iii Contents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 General characteristics 4 4.1 Introduction . 4 4.2 Requirements common to all formats 4 4.3 Environmental conditions 5 5 Magnetic stripe char
6、acteristics . 5 5.1 Stripe surface 5 5.2 Stripe adherence. 6 5.3 Stripe life 6 5.4 Magnetic characteristics 7 5.5 Magnetic stripe zone reservation 7 6 TFC.0 data recording 7 6.1 Magnetic track characteristics 7 6.2 Encoding characteristics . 8 7 TFC.1 data recording 9 7.1 Magnetic track characterist
7、ics 9 7.2 TFC.1-specific stripe requirements. 10 7.3 Encoding characteristics . 11 8 TFC.5 data recording 12 8.1 Magnetic track characteristics 12 8.2 TFC.5-specific stripe requirements. 12 8.3 Encoding characteristics . 12 Annex A (normative) Magnetics classes . 14 Annex B (normative) Encoding clas
8、ses. 16 Bibliography . 19 BS ISO/IEC 15457-2:2007iv Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the d
9、evelopment of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-gover
10、nmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task o
11、f the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vot
12、e. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 15457-2 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information techn
13、ology, Subcommittee SC 17, Cards and personal identification. This second edition cancels and replaces the first edition (ISO/IEC 15457-2:2001), Annex A of which has been technically revised. ISO/IEC 15457 consists of the following parts, under the general title Identification cards Thin flexible ca
14、rds: Part 1: Physical characteristics Part 2: Magnetic recording technique Part 3: Test methods BS ISO/IEC 15457-2:20071 Identification cards Thin flexible cards Part 2: Magnetic recording technique 1 Scope Thin flexible cards (TFCs) are used to automate the controls for access to goods or services
15、such as mass transit, highway toll systems, car parks, vouchers and stored value. For these applications, data can be written and/or read by machines using various recording techniques: magnetic stripe, optical character recognition (OCR), bar code, etc. This part of ISO/IEC 15457 specifies the magn
16、etic stripe and encoding characteristics of thin flexible cards at two points in the cards life cycle: at the point of loading into the card-issuing equipment; at the point of issue to the public. Guidance concerning the storage and usage of finished cards (including magnetic stripe cards) under var
17、ious environmental conditions is given in ISO/IEC 15457-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (in
18、cluding any amendments) applies. ISO 4287, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface texture parameters ISO/IEC 7811-2, Identification cards Recording technique Magnetic stripe Low coercivity ISO/IEC 7811-6, Identification cards Recording
19、 technique Magnetic stripe High coercivity ISO/IEC 15457-1, Identification cards Thin flexible cards Part 1: Physical characteristics ISO/IEC 15457-3, Identification cards Thin flexible cards Part 3: Test methods BS ISO/IEC 15457-2:20072 3 Terms and definitions For the purposes of this document, the
20、 terms and definitions given in ISO/IEC 15457-1 and the following apply. 3.1 track area of stripe surface occupied by the data encoded by a single channel of the magnetic recording write/read interface 3.2 central stripe stripe centred on the widthwise axis of the card 3.3 lateral stripe any widthwi
21、se stripe which is not centred on the widthwise axis of the card 3.4 re-usable card durable card able to be recovered from the field (generally by automatic equipment operation) and re-issued 3.5 unused unencoded card card possessing all the components required for its intended purpose, which has no
22、t been subjected to any personalisation or testing operation and which has been stored in a clean environment with no more than a 48 h exposure to daylight at temperatures between 5 C and 30 C and a humidity between 10 % and 90 % without experiencing thermal shock 3.6 unused encoded card card accord
23、ing to 3.5 that has only been encoded with all the data required for its intended purpose (e.g. magnetic encoding, printing, etc.) 1)3.7 returned card card according to 3.6 after it has been issued to the card holder and returned for the purpose of testing (e.g. re-usable card returned for possible
24、re-issue) 2)3.8 R a , R zmeasures of surface irregularity as defined in ISO 4287 3.9 maximum field, H maxmaximum absolute magnetic field strength applied as described by the test method 3.10 coercivity, H cM= H cJcontinuously applied magnetic field which reduces the magnetisation to zero from a prev
25、ious maximum magnetisation state in the opposite direction, the quantity of interest being that which is measured parallel to the longitudinal axis of the stripe 1) The definitions used in ISO/IEC 7811 refer to embossing and electronic encoding, which are not defined in ISO/IEC 15457. However, print
26、ing on issue (as opposed to pre-printing) frequently accompanies magnetic encoding in applications of thin flexible cards. 2) In certain applications of thin flexible cards, the purpose of testing returned cards is to establish their suitability to be re-issued for re-use. Such testing is generally
27、done automatically by bulk sorter/encoder equipment. BS ISO/IEC 15457-2:20073 3.11 longitudinal squareness, SQ = M r /M (at H max ) ratio of the value of magnetisation (M r ) at zero magnetic field (H=0) after the application and removal of the maximum field (H max ) to the magnetisation (M) at the
28、maximum field applied (H max ) measured along the longitudinal axis of the stripe 3.12 switching field by derivative, SF Dthe width at half height of the differentiated static magnetisation curve M(H) divided by the coercivity from the same curve 3.13 switching field by slope, SF S( /H 2 /-/H 1 /)/
29、H cM , where M(-/H 1 /) = 0,5M rand M(-/H 2 /) = -0,5 M r ; the difference between the field values at the intercept of the static magnetisation M(H) loop with M(H) = 0,5M rand M(H) = -0,5M r , divided by the coercivity 3.14 recording technique technique, such as magnetic or optical encoding, used t
30、o store data on the card 3.15 nominal bit density, D Rencoding density specified for a track 3.16 maximum test current, I maxupper of two test write currents used for testing TFC magnetic stripes 3.17 maximum test density, D maxupper of two test recording densities used for testing TFC magnetic stri
31、pes 3.18 minimum test current, I minlower of two test write currents used for testing TFC magnetic stripes 3.19 minimum test density, D minlower of two test recording densities used for testing TFC magnetic stripes 3.20 individual signal amplitude, U ibase-to-peak amplitude of a single readback sign
32、al pulse 3.21 average signal amplitude, U Aarithmetic mean of the absolute values of the individual signal amplitudes found in a readback waveform: n i =1 A= (where is the number of individual signal amplitudes) k k U Un nBS ISO/IEC 15457-2:20074 3.22 modulation, m range of variation of a readback s
33、ignal defined by A U U U m = 2 imin imaxwhere U iis the individual readback signal amplitude and U Ais the average readback signal amplitude recorded at D maxand I max4 General characteristics 4.1 Introduction Three card sizes, TFC.0, TFC.1 and TFC.5, are defined in ISO/IEC 15457-1. Common physical
34、characteristics and the geometrical and topographical characteristics of each card size are specified in ISO/IEC 15457-1. In this part of ISO/IEC 15457, the magnetic stripe and track characteristics specific to each size of card are given in separate clauses. Common characteristics are specified in
35、Clause 4. Specifications for the permitted magnetic and encoding characteristics are given in the annexes. All clauses in all parts of ISO/IEC 15457 apply to finished cards or to the reels/packs from which such cards are taken. Certain clauses however, such as durability, concern the characteristics
36、 of the card throughout its life. As a matter of convenience and practicality, certain tests can be carried out on unfinished cards where it can be demonstrated that no significant change in that property can arise during subsequent processing. 4.2 Requirements common to all formats 4.2.1 General re
37、quirements Thin flexible cards may be finished in a variety of ways, according to the requirements of the system in which they are to be used. This part of the standard deals with those which are equipped with a magnetic stripe. Stripes may be magnetically encoded, in accordance with this part of IS
38、O/IEC 15457. The addition of a magnetic stripe and the encoding of that stripe shall not affect the continued conformance of the finished cards to the other applicable parts of ISO/IEC 15457. Magnetic stripes, however presented, shall be free from defects which could interfere with usage, such as jo
39、ins, discontinuities, loose particles, embedded debris, creases, indentations and high spots. They shall not adhere to, or leave an impression on, the adjacent cards in a reel or pack. 4.2.2 Reference edges Once identified in accordance with the criteria defined in ISO/IEC 15457-1, the same front an
40、d reference edges shall be used exclusively and consistently in applying all relevant parts of ISO/IEC 15457, including this. NOTE 1 In the case of a central stripe, this constraint results in a unique relationship between reference edges and the beginning of the encoded message. NOTE 2 For example,
41、 in the case of a lateral stripe, this constraint results in the unique relationship between reference edges and stripe shown in Figure 1. BS ISO/IEC 15457-2:20075 Back Reference edges are indicated by the black triangles. Figure 1 Reference edges for lateral stripe 4.3 Environmental conditions 4.3.
42、1 Testing environment The environmental conditions under which the characteristics specified in this part of ISO/IEC 15457 are to be measured are specified in ISO/IEC 15457-3. 4.3.2 Storage environment and packaging Magnetic stripes shall continue to comply with the requirements of this part of ISO
43、15457 after storage under the storage environment and packaging conditions specified in ISO/IEC 15457-1. 4.3.3 Usage environment Magnetic stripes shall remain structurally reliable and usable within the usage environment specified in ISO/IEC 15457-1. 5 Magnetic stripe characteristics 5.1 Stripe surf
44、ace 5.1.1 Protrusion In order to accommodate manufacturing processes which apply the magnetic stripe as tape, this part of ISO/IEC 15457 defines two classes of protrusion, as follows. Class 1: The maximum protrusion of the magnetic stripe surface above the surface of the base material shall not be l
45、ess than 0 m and shall not be greater than 12 m. Class 2: The maximum protrusion of the magnetic stripe surface above the surface of the base material shall not be less than 0 m and shall not be greater than 25 m. Class 2 protrusion is permited on TFC.1 cards with paper or composite substrates only.
46、 5.1.2 Profile deviation The straight line deviation of the profile across stripes greater than 3 mm shall be less than 8 m. 5.1.3 Roughness The roughness of the magnetic stripe surface, measured along lines parallel to the height and width dimensions, shall be in accordance with Table 1. BS ISO/IEC
47、 15457-2:20076 Table 1 Stripe roughness Dimensions in micrometres Encoding density R a (max) R z (max) u 3 bits/mm u 1,6 u 10 3 bits/mm u 1,4 u 8 5.1.4 Stripe area warpage The maximum deformation of the card material due to the application of the magnetic stripe shall be such that, when the card is
48、laid on its back on a flat surface and a force of 2,2 N is applied uniformly on its front, the maximum perpendicular distance which can be measured from any point on the magnetic stripe to the flat surface does not exceed 80 m. 5.1.5 Stripe area curl The curl of a single card shall not exceed 1 mm w
49、hen a force of 4,9 N is applied to an area between the lower edge of the magnetic stripe and the lower edge of the card when the card is laid on its front on a flat surface (see Figure 2). curl weight curl lower edge of magnetic stripe card under testFigure 2 Curl of the stripe area 5.2 Stripe adherence The magnetic stripe shall remain firmly fixed to the card material during the lifetime of the card. It shall not be possible
