1、DEUTSCHE NORM Julv 1997 90 g/m2 paper for use in optical character recognition systems - Requirements and testing Part 1 : Uncoated, untreated paper DIN 6723-1 ICs 35.260.20 Descriptors: Paper, optical character recognition systems. Supersedes February 1995 edition. Papiere fr die Datenverarbeitung
2、- 90-g/mZ-Papier fr Belegsortierleser - Teil 1 : Ungestrichen, unbeschichtet - Anforderungen, Prfung In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. Foreword This standard has
3、 been prepared by Technical Committee Datenverarbeitungs- und Bropapiere of the Normenausschu Papier und Pappe (Paper and Board Standards Committee). This standard covers paper that will have machine-readable alphanumeric characters printed upon it (.e. for use in optical character recognition (OC!?
4、) systems). Such paper is used for document exchange (e.g. automatic payment transactions). The requirements specified here for the mechanical properties of the paper take into account both the manual and automatic handling of documents, especially as regards the extreme loading to which the paper i
5、s subjected when copies are separated from originals and when documents are automatically collated or fed through the reading/sorting machine or scanner. This loading is a result of the multiple times and the speed with which documents are fed through the machine or scanner (e.g. when sorting). Expe
6、rience has shown that paper with a grammage less than 90 g/mZ - or paper with this grammage but which does not meet the requirements specified in this standard - is not suitable for high-speed processing (e.g. in high-speed coders/coding machines, sorter/readers or scanners). Amendments The followin
7、g amendments have been made to the February 1995 edition: a) The status of the standard is now that of a full standard. b) Requirements for the tensile index are now included. c) The standard has been editorially revised. Previo us edit ions DIN 6723: 1970-06; DIN 6723-1: 1981-1 1; DIN V 6723-1: 199
8、5-02. 1 Scope and field of application This standard specifies requirements and methods of test for paper intended for use in state-of-the-art optical character recognition (OC!?) systems (e.g. paper to be processed in sortingheading machines or scanners). The requirements for mechanical properties
9、specified here ensure that the paper will withstand any loading to which it is subjected. Care should be taken that any changes to these properties (e.g. as a result of printing processes or document handling) do not adversely affect the performance of the paper. Continued on pages 2 to 4. Translati
10、on by DI N-Sprachendienst In case of doubt, the German-language original should be consulted as the authoritative text No pari of this translation may be reproduced without the prior permission of Ref. No. DIN 6723-1 : 1997-0 .- V Deutsches Institut fr Nonung e. V., Berlin. Luth Verlag GmbH, D-10772
11、 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). English price group 05 Sales No. 0105 08.98 Page 2 DIN 6723-1 : 1997-07 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cit
12、ed at the appropriate place in the text and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated into it by amendment or revision. For undated references, the latest edi
13、tion of the publication referred to applies. DIN 531 07 DIN 531 O9 DIN 531 19-1 DIN 53121 DIN 531 26 DIN 531 45-1 DIN 531 45-2 DIN 531 46 DIN 66223-1 DIN EN 20187 DIN EN IS0 186 DIN EN IS0 536 DIN EN IS0 1924-2 Determination of smoothness of paper and board by the Bekk method Determination of the ab
14、rasion resistance of paper and board by the abrasion wheel method Determination of the friction resistance of paper - Method of recording data Determination of the bending stiffness of paper and board by the beam methods Determining the suitability for writing of paper Determination of the reflectan
15、ce factor of non-fluorescent paper Determination of the reflectance factor of fluorescent paper Determination of opacity of paper Fonts for optical character recognition, paper and print quality - Requirements and testing Standard atmosphere for conditioning and testing of paper, board and pulps and
16、 procedure for monitoring the atmosphere and conditioning of samples (IS0 187 : 1990) Sampling of paper and board to determine average quality (IS0 186 : 1994) Determination of grammage of paper and board (IS0 536 : 1995) Determination of tensile properties of paper and board - Constant rate of elon
17、gation method (IS0 1924-2 : 1995) 3 Designation Designation of paper in accordance with this standard, which is intended for use in OCR systems and has a grammage of 90 g/m2 (90): Paper DIN 6723 - 90 4 Requirements At least 95 YO of the single results and the arithmetic mean of all results obtained
18、for each property tested in accordance with clause 5 shall meet the following requirements. 4.1 Suitability for writing When tested as in subclause 5.3, the paper shall be suitable for writing in ink. 4.2 Grammage When determined in accordance with subclause 5.4, the grammage shall be 90 g/m2I4 YO.
19、4.3 Bending stiffness When tested as in subclause 5.5, the bending stiffness per unit width shall be at least 0,50 N . mm (when tested in the machine direction) and 0,20 N . mm (when tested in the cross direction). 4.4 Smoothness When testing as in subclause 5.6, the Bekk smoothness value shall be a
20、t least 18 s and no greater than 80 s. 4.5 Tensile index The tensile index for the tensile strength measured in the machine direction shall be at least 53 N . m/g, while that for the cross direction shall be at least 24 N . m/g, when testing in accordance with subclause 5.7. 4.6 Abrasion resistance
21、The mass of the rubbed-off material shall be no more than 30 mg, when testing in accordance with subclause 5.8. 4.7 Friction resistance When testing in accordance with subclause 5.9, the static and the dynamic coefficients of friction shall lie between 0,25 and 0,5. Page 3 DIN 6723-1 : 1997-07 4.8 C
22、url The curl of the paper shall not be more than 4 mm when tested as in subclause 5.1 O. 4.9 Optical properties When testing as in subclause 5.1 1, the requirements for paper quality as specified in subclauses 3.1 to 3.6 of DIN 66223-1, March 1983 edition, shall be met. 5 Testing 5.1 Sampling Sampli
23、ng shall be as in DIN EN IS0 186. 5.2 Test atmosphere Samples or test pieces shall be conditioned for 24 hours prior to testing in the standard atmosphere specified in DIN EN 20187 (.e. (23 Il) “C and (50 I2)% relative humidity). All tests shall be carried out the same atmosphere, except the curl te
24、st (see subclause 5.1 O). 5.3 Suitability for writing Testing as in DIN 53126. 5.4 Grammage Determination as in DIN EN IS0 536. 5.5 Bending stiffness At least 20 test pieces for each principal direction shall be tested according to the two-point loading method specified in subclause 5.1 of DIN 53121
25、, December 1996 edition. 5.6 Smoothness Testing as in DIN 531 07. 5.7 Tensile index Determination as in DIN EN IS0 1924-2 5.8 Abrasion resistance At least 20 test pieces (ten for each side of the paper) shall be tested in accordance with DIN 531 O9 using aforce of 5 N and 100 turns of the wheel. 5.9
26、 Friction resistance The static and dynamic coefficients of friction shall be determined in accordance with DIN 531 19-1 using at least ten test pieces. Any other method used shall be capable of producing comparable results. NOTE: The static coefficient of friction has a special significance for cer
27、tain applications (e.g. automatically Lay all test pieces in the same direction (machine or cross) on top of each other, with bottom sides facing top sides. Calculate the mean dynamic and static coefficients for each direction. Single test results are to be recorded in the test report. Ensure that t
28、he test atmosphere remains constant and that the atmosphere in the immediate vicinity of the test apparatus is not affected by the presence of testing personnel (e.g. by their breathing). Water droplets are not to form on the test pieces. In deviation from the specifications of DIN 531 19-1, the pla
29、te that is rubbed on the specimen (Flache A) is not to be of hardmetal but of the same material used for the padding on the support plate (Reibbrett). Furthermore, the area of Flache A is to be about 50 cm2 (.e. (70 12) mm x (70 12) mm). tearing copies from originals in document processing machines)
30、. 5.10 Curl Testing shall be in any direction on round test pieces having a 1 O0 mm diameter. At least ten test pieces are required for each side of the paper. All test pieces are to be laid on a flat surface, half with the top side facing up, half with the top side facing down. Condition all test p
31、ieces in the standard atmosphere specified in subclause 5.2 (.e. (23 I 1) “C and (50 12) YO relative humidity) for 4 hours and then measure the distance between each curled specimen and the flat support surface, at the point where the curl Page 4 DIN 6723-1 : 1997-07 is greatest. Then, condition all
32、 test pieces for four hours at the same temperature but with a relative humidity of (25 I 5) YO; again, measure the curl at the point where it is greatest. Take the mean obtained forthe test pieces with the top side facing up and the mean for those with the bottom side facing up. Use the greater of
33、the two means for evaluation. The uncertainty of measurement shall be no more than I1 mm. 5.1 1 Optical properties Testing shall be as in subclauses 3.1 to 3.6 of DIN 66233-1, March 1983 edition. Opacity shall be determined as in DIN 53146. The reflectance factor shall be determined as in DIN 53145-
34、1 (for non-fluorescent material) or DIN 53145-2 (for material containing fluorescent additives), using CIE illuminant 065 (d/l O) in both cases. 6 Test report The test report shall include reference to this standard and the following details: a) type and designation of the paper tested; b) mean or s
35、ingle test results (cf. relevant subclauses); c) any deviations from this standard; d) date of testing. 7 Marking Supplies of paper in accordance with this standard shall be marked with the designation specified in clause 3 and the manufacturers symbol. Other relevant standards DIN 6723-2 90 g/m2 pa
36、per for use in optical character recognition systems - Requirements and testing - Coated, treated, carbonless copy paper DIN 6724-1 65 to 85 g/m2 paper for use in optical character recognition systems- Requirements and testing - Uncoated, untreated paper DIN 6724-2 65 to 85 g/m2 paper for use in optical character recognition systems- Requirements and testing - Coated, treated, carbonless copy paper
