1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 16532-3:2010Paper and board Determination of greaseresistancePart 3: Turpentine test for voids in glassineand greaseproof papersBS ISO 16532-3:2010 BRITISH STANDARDNationa
2、l forewordThis British Standard is the UK implementation of ISO 16532-3:2010.The UK participation in its preparation was entrusted to TechnicalCommittee PAI/11, Methods of test for paper, board and pulps.A list of organizations represented on this committee can beobtained on request to its secretary
3、.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 61004 2ICS 85.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under
4、 the authority of theStandards Policy and Strategy Committee on 31 January 2011.Amendments issued since publicationDate Text affectedBS ISO 16532-3:2010Reference numberISO 16532-3:2010(E)ISO 2010INTERNATIONAL STANDARD ISO16532-3First edition2010-10-01Paper and board Determination of grease resistanc
5、e Part 3: Turpentine test for voids in glassine and greaseproof papers Papier et carton Dtermination de limpermabilit aux graisses Partie 3: Essai la trbenthine pour papiers glassine et papiers ingraissables BS ISO 16532-3:2010ISO 16532-3:2010(E) PDF disclaimer This PDF file may contain embedded typ
6、efaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infr
7、inging Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were opt
8、imized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2010 All rights reserved.
9、Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. I
10、SO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedBS ISO 16532-3:2010ISO 16532-3:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduc
11、tion.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Principle1 5 Reagents.2 6 Apparatus.2 7 Sampling.2 8 Conditioning 3 9 Preparation of test pieces.3 10 Procedure.3 11 Observation intervals3 12 Expression of results4 13 Test report4 Annex A (informative) Precision5 Bibliography7 BS
12、 ISO 16532-3:2010ISO 16532-3:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technica
13、l committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely wit
14、h the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft Inter
15、national Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may
16、 be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 16532-3 was prepared by Technical Committee ISO/TC 6, Paper, board and pulps, Subcommittee SC 2, Test methods and quality specifications for paper and board. ISO 16532 consists of t
17、he following parts, under the general title Paper and board Determination of grease resistance: Part 1: Permeability test Part 2: Surface repellency test Part 3: Turpentine test for voids in glassine and greaseproof papers BS ISO 16532-3:2010ISO 16532-3:2010(E) ISO 2010 All rights reserved vIntroduc
18、tion The resistance of paper and board to penetration by fats, greases and oils in paper and board is of particular importance for certain purposes, for example the packaging of food. The packaging should not only provide an effective grease barrier, but should also prevent the formation of aestheti
19、cally unacceptable grease spots on the packaging surfaces. BS ISO 16532-3:2010BS ISO 16532-3:2010INTERNATIONAL STANDARD ISO 16532-3:2010(E) ISO 2010 All rights reserved 1Paper and board Determination of grease resistance Part 3: Turpentine test for voids in glassine and greaseproof papers 1 Scope Th
20、is part of ISO 16532 specifies a method for the determination of the grease resistance of paper and board. It provides an accelerated comparison of the relative rates at which oils or greases, such as those commonly found in foodstuffs, can be expected to penetrate voids in papers such as greaseproo
21、f or glassine, where the grease or oil resistance is provided by mechanical means only. It is not applicable to grades of paper or board that are given grease or oil resistance by means of a coating or internal treatment for which ISO 16532-1 or ISO 16532-2 apply. 2 Normative references The followin
22、g 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 (including any amendments) applies. ISO 186, Paper and board Sampling to determine average qualit
23、y ISO 187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning the samples ISO 536, Paper and board Determination of grammage 3 Terms and definitions For the purposes of this document, the following terms and definition
24、s apply. 3.1 grease resistance ability of the paper or board to resist the formation of surface spots or stains, or the permeation of grease through the sheet 3.2 voids places in the paper where the arrangement of the fibres is such that oil or grease can penetrate the sheet 4 Principle The test pie
25、ce is placed on a sheet of coated paper on a flat surface and a small mound of sand is placed on the test piece. The sand is then saturated with coloured turpentine. The time taken for a stain to appear on the coated paper beneath the sand is noted. BS ISO 16532-3:2010ISO 16532-3:2010(E) 2 ISO 2010
26、All rights reserved5 Reagents 5.1 Pure gum spirits of turpentine, with a density of 860 kg/m3to 875 kg/m3at 20 C. 5.2 Anhydrous calcium chloride. 5.3 Oil-soluble dye (for example Sudan red). 5.4 Sand, Ottawa cement-testing sand, screened to pass an 800 m screen but retained on a 630 m screen. NOTE O
27、ttawa cement-testing sand is available commercially from some laboratory suppliers. 5.5 Test solution: to 100 ml of turpentine (5.1), add 5 g of anhydrous calcium chloride (5.2) and 1,0 g of oil-soluble dye (5.3) and store in a stoppered bottle (6.7). Shake well, and let the solution stand for at le
28、ast 10 h, shaking occasionally. Then filter through a dry filter paper at a temperature of 23 C 1 C, and store in the stoppered bottle (6.7). Ensure that the bottle is airtight. 6 Apparatus 6.1 Tube of any rigid material, 25 mm internal diameter and at least 25 mm in height, the ends of which have b
29、een smoothed. 6.2 Automatic pipette, of appropriate maximum volume, calibrated to deliver 1,1 ml of test solution. 6.3 Printing paper, flat, white, coated and calendered sheet or sheets of a convenient size to support at least 10 test pieces. A grammage of 100 g/m2to 120 g/m2is recommended (see ISO
30、536). 6.4 Stopwatch or timer, accuracy 0,5 s. 6.5 Watch glass, diameter 76 mm. 6.6 Scoop, of capacity 5 g. Verify the capacity of the scoop by weighing 2 charges of sand (5.4) on an analytical balance (6.8): each charge should weigh (5,0 0,1) g. The design of the scoop should preferably facilitate t
31、he pouring of the sand (5.4) into the tube (6.1). 6.7 Stoppered glass bottle, of capacity 100 ml. 6.8 Analytical balance, of minimum capacity 10 g and with a scale interval of 0,01 g; accuracy class ordinary (IIII)1). 7 Sampling If the test is being made on a lot of paper or board, the sample shall
32、be selected in accordance to ISO 186. If the test is being made on another type of sample, report the source of the sample and, if possible, the sampling procedure used. Make sure that the test pieces taken are representative of the paper or board sample. 1) Accuracy classes for non-automatic weighi
33、ng instruments are described in OIML R 76-15. BS ISO 16532-3:2010ISO 16532-3:2010(E) ISO 2010 All rights reserved 38 Conditioning Condition the sample in accordance with ISO 187. The alternative conditions specified in ISO 187 shall not be used, as it has been determined that the temperature has a s
34、trong influence on the test results. Thus only 23 C 1 C shall be used. Place the bottle of test solution (5.5) in the conditioned atmosphere and allow its temperature to come into equilibrium. 9 Preparation of test pieces Prepare from the conditioned sample, in the same conditioned atmosphere (see C
35、lause 8), ten test pieces of 100 mm 100 mm, identifying, if possible, five pieces as the top side and five pieces as the wire side. Mark the first side of each test piece as side 1. 10 Procedure 10.1 Place a coated paper sheet or sheets (6.3), on a smooth, flat horizontal surface. Then, alternativel
36、y place the first marked side (top side if known or side 1 if unknown) of a test piece, followed by the other side, such that no test piece extends beyond the edge of the coated paper. 10.2 Rest one end of the tube (6.1) squarely on a test piece and with the scoop (6.6) put 5,0 g 0,1 g of the sand (
37、5.4) in the tube. Remove the tube immediately after addition of the sand by carefully lifting it vertically. NOTE The purpose of the tube is solely to ensure that a uniform sand pile is applied to the test piece. 10.3 Add 1,1 ml 0,05 ml of the test solution (5.5) to the sand pile, using an automatic
38、 pipette (6.2). Start the timing device (6.4) as the last drop of test solution leaves the pipette. 10.4 At specific intervals (see Clause 11), gently slide the test piece to a new unexposed position of the coated paper and examine the previously exposed position for signs of staining. The first sig
39、n of staining, which indicates that the test solution (5.5) has penetrated the test piece, is the end-point of the test. 10.5 Record the time elapsed from the addition of the test solution (5.5) to the sand until the first sign of staining of the coated paper. If staining has not occurred after 30 m
40、in (1 800 s), terminate the test. If it takes longer than 120 s for the test solution (5.5) to penetrate the test piece, cover the sand pile with the watch glass (6.5). 10.6 Repeat 10.2 to 10.4 for the remaining test pieces. NOTE If the first pair of tests show that the end-point times exceed 900 s,
41、 the test may be expedited by placing the remaining 8 test pieces on the coated paper, adding sand (5.4) and then test solution (5.5), followed by starting the timer (6.4) as in 10.3 at 10 s intervals. 11 Observation intervals Make observations at least at the following intervals: every 15 s between
42、 0 and 1 min; every 1 min between 1 min and 5 min; every 5 min between 5 min and 30 min. If the end-point times for the first two test pieces exceed 15 min, make observations every 5 min, starting at 15 min. BS ISO 16532-3:2010ISO 16532-3:2010(E) 4 ISO 2010 All rights reserved12 Expression of result
43、s Calculate the mean penetration time, in seconds, for all test pieces to two significant figures. If the results from the two sides can be distinguished, either as top and wire sides or by a clear difference in the values, then calculate separately the means of the two sides. Also note the maximum
44、and minimum values. If, in the calculation of any mean values, one or more results is greater than 1 800 s (30 min), include these values as 1 800 and report the mean as X (where indicates greater than). For maximum values greater than 1 800 s, record as 1 800. EXAMPLE Assuming that it is not possib
45、le to identify the top and wire sides, record as follows: Side 1 Other side 1 800 600 1 700 550 1 600 500 1 700 600 1 800 500 Mean 1 700 550 Minimum 1 600 500 Maximum 1 800 600 13 Test report The test report shall include the following information: a) a reference to this part of ISO 16532 (i.e. ISO
46、16532-3:2010); b) all information for the complete identification of the sample; c) the date and place of testing; d) when possible, identification of the side or sides tested; e) for each sample the mean, and maximum and minimum values, and if applicable, individual results for the two sides; f) an
47、y departure from this part of ISO 16532 or any other circumstances that might have affected the results. BS ISO 16532-3:2010ISO 16532-3:2010(E) ISO 2010 All rights reserved 5Annex A (informative) Precision A.1 General In 2008, five paper samples of varying greaseproof levels were subjected to an int
48、ernational round-robin in which 10 laboratories participated. Five tests were carried out on both the top side and wire side of each sample. The results were statistically analysed for repeatability and reproducibility and are summarized in Tables A.1 and A.2. For samples 3 to 5, no significant diff
49、erence between results for the two sides were found, therefore the repeatability and reproducibility values are mean values of both sides. The calculations have been made according to ISO/TR 244982and TAPPI T 12004. The repeatability standard deviation indicated in Table A.1 is the “pooled” repeatability standard deviation, that is, the standard deviation calculated as the root-mean-square of the standard deviations of the participating laboratories. This differs from the conventi
