1、October 2010 Translation by DIN-Sprachendienst.English price group 6No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、 67.250; 97.200.50!$o+=“1760826www.din.deDDIN 53160-1Determination of the colourfastness of articles for common use Part 1: Test with artificial salivaEnglish translation of DIN 53160-1:2010-10Bestimmung der Farblssigkeit von Gebrauchsgegenstnden Englische bersetzung von DIN 53160-1:2010-10Dterminat
3、ion de la libration de colorants des objets utilitaires Partie 1: Essai la salive artificielleTraduction anglaise de DIN 53160-1:2010-10SupersedesDIN V 53160-1:2002-10www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Teil 1: Prfung mit Speichelsimulanz0 .11
4、Document comprises 7 pages5 DIN 53160-1:2010-10 A comma is used as the decimal marker. Contents Page Foreword. 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 4 4 Apparatus and materials. 5 5 Reagents 5 6 Procedure. 6 7 Evaluation 6 8 Test report 6 9 Precision 6 Bibliography . 7 2 DIN
5、 53160-1:2010-10 Foreword This standard has been prepared by Joint Working Group NA 078-00-14-01 GAK Speichel- und Schweiecht-heit of Joint Working Committee NA 078-00-14 GA Analysenverfahren fr Farbmittel of the Normenausschuss Pigmente und Fllstoffe (Pigments and Extenders Standards Committee). Am
6、endments This standard differs from DIN V 53160-1:2002-10 as follows: a) Clause 1 “Scope” has been amended; b) Clause 3 “Terms and definitions” has been added; c) in Clause 4 “Apparatus and materials” cling film has been added; d) the standard has been editorially revised and brought in line with th
7、e current rules of presentation. Previous editions DIN 53160: 1965-10, 1974-06 DIN V 53160-1: 2002-10 3 DIN 53160-1:2010-10 1 Scope This standard specifies a method of testing the colourfastness of articles for common use to artificial saliva. The method is particularly suitable for those articles t
8、hat are intended to be taken into the mouth, or for which it can be foreseen that they will, when used, be taken into the mouth or come into contact with the mucous membranes. With the test it is established whether colouring materials can migrate from the articles for common use to the mouth or to
9、the mucous membranes. This standard does not apply to articles for common use that are intended to come into contact with foodstuffs or to those articles or parts of articles whose function is the release of colouring materials. NOTE Examples of the latter are wax crayons and leads of pencil crayons
10、 The test method is applicable to all articles for common use, independent of the colouring procedure applied (e.g. dyeing, staining, coating). Possible mechanical wear (e.g. exposure of a coloured layer after mechanical abrasion of a finishing coat) is not taken into account. 2 Normative reference
11、s 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 (including any amendments) applies. DIN 12491, Laboratory glassware Vacuum desiccat
12、ors DIN 12880, Electrical laboratory devices Heating ovens and incubators DIN EN 20105-A03, Textiles Tests for colour fastness Part A03: Grey scale for assessing staining DIN ISO 3696, Water for analytical laboratory use Specification and test methods 3 Terms and definitions For the purposes of this
13、 document the following terms and definitions apply. 3.1 colourfastness migration of a colouring material from the article to be tested to the filter paper using a simulant 3.2 colouring materials generic term for all chromophoric substances NOTE See DIN 55944 for the classification of colouring mat
14、erials. DIN 55943:2001-10, 3.58 3.3 finishing coat final coat of a coating system DIN EN ISO 4618:2007-03, 2.108 4 DIN 53160-1:2010-10 4 Apparatus and materials 4.1 Filter paper, for qualitative analyses, medium-dense. 4.2 Adhesive tape, colourless, self-adhesive plastics tape, about 12 mm wide. 4.3
15、 Film, cling film as used in households. 4.4 Desiccator, as in DIN 12491. 4.5 Oven, as in DIN 12880, suitable for an operating temperature of (37 2) C. 5 Reagents 5.1 General Unless otherwise specified, only analytical-grade reagents and water of at least grade 3 purity as defined in DIN ISO 3696 sh
16、all be used for the artificial saliva. 5.2 Composition of the artificial saliva of pH value 6,8 0,1 Table 1 Artificial saliva Reagents Mass fraction g/l Magnesium chloride (MgCl2 6H2O) 0,17 Calcium chloride (CaCl2 2H2O) 0,15 Dipotassium hydrogen phosphate (K2HPO4 3H2O) 0,76 Potassium carbonate (K2CO
17、3) 0,53 Sodium chloride (NaCl) 0,33 Potassium chloride (KCl) 0,75 1 % (m/m) Hydrochloric acid to be added until a pH value of 6,8 0,1 is achieved. 5.3 Preparation of the artificial saliva Dissolve the potassium and sodium salts in about 900 ml of water. Then add calcium chloride and magnesium chlori
18、de and stir until the complete dissolution of all the reagents added. Calibrate the pH meter in accordance with the manufacturers instructions using buffer solution. Immerse the pH electrode in the solution, stir slightly, and add hydrochloric acid until a stable pH value of 6,8 0,1 is achieved. Tra
19、nsfer the solution to a 1 000 ml one-mark volumetric flask and make up to the mark with water. Protect from light and make sure before use that the pH value of the artificial saliva is in the range of 6,8 0,1. NOTE If the artificial saliva is to be stable longer than two weeks, it is recommended to
20、use water that has been heated to boiling for ten minutes. 5 DIN 53160-1:2010-10 6 Procedure 6.1 Depending on the size of the article to be tested (referred to as the specimen in the following), cut a strip about 15 mm wide and up to 80 mm long from the filter paper (4.1). 6.2 Soak the filter paper
21、strip using artificial saliva (5.3). 6.3 Place the soaked filter paper strip (see 6.2) on the specimen and attach it to the specimen, e.g. with the adhesive tape (4.2) or film-wrapped (4.3), making sure that there is close contact between the specimen and the soaked filter paper (particularly to be
22、observed in the case of curved articles). For this purpose, the adhesive tape shall cover the filter paper strip over its entire length, and at least 10 mm shall project over both ends of the strip so that it can adhere to the dry areas of the specimen. If the article to be tested is too large, carr
23、y out the test using a portion or a cutout of the article. If the article is too small to be arranged for the test as described above (e.g. wooden beads) it is to be tightly wrapped in a piece of filter paper soaked with the artificial saliva. 6.4 Store the specimen prepared as described in 6.3 in t
24、he desiccator (4.4) over water at (37 2) C for two hours. Previously bring the desiccator to the test temperature using the oven (4.5) and leave it there during the period of test. 7 Evaluation Remove the filter paper from the specimen. Place the filter paper, with the adhesive tape side facing down
25、wards, in the oven and dry it at (37 2) C for one hour. Evaluate the coloration of the filter paper by comparison with the grey scale as defined in DIN EN 20105-A03. Indicate the step on the grey scale as the result. If the filter paper is not coloured uniformly, evaluate the area with the strongest
26、 coloration and indicate this in the test report. NOTE To facilitate the assessment, the grey scale together with the stained filter paper strips can be assessed using a commercially available scanner/copier, where the colour intensity is expressed in grey scale steps and compared to the grey scale
27、determined simultaneously. 8 Test report The test report shall include at least the following details: a) all details necessary to identify the article for common use tested; b) a reference to this standard (DIN 53160-1); c) the test result: Step on the grey scale (see Clause 7); d) any deviation fr
28、om the test method specified; e) the date of testing. 9 Precision Information on precision is currently not available. 6 DIN 53160-1:2010-10 7 Bibliography DIN 55943:2001-10, Colouring materials Terms and definitions DIN 55944, Colouring materials Classification according to coloristic and chemical aspects DIN EN ISO 4618:2007-03, Paints and varnishes Terms and definitions (ISO 4618:2006)
