EN 12720:1997

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.DPMöbel - Bewertung der Beständigkeit von Oberflächen gegen kalte Flüssigkeiten (ISO 4211:1979 modifiziert)Meubles - Evaluation des surfaces aux liquides froids (ISO 4211:1979 modifiée)Furniture - Assessment of surface resistance to cold liquids (ISO 4211:1979 modified)97.140PohištvoFurnitureICS:Ta slovenski standard je istoveten z:EN 12720:1997SIST EN 12720:1997en01-oktober-1997SIST EN 12720:1997SLOVENSKI
STANDARDSIST ISO 4211:19951DGRPHãþD



SIST EN 12720:1997



SIST EN 12720:1997



SIST EN 12720:1997



SIST EN 12720:1997



SIST EN 12720:1997



SIST EN 12720:1997



SIST EN 12720:1997



SIST EN 12720:1997



SIST EN 12720:1997



SIST EN 12720:1997



SIST EN 12720:1997



International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEWYHAPO~HAF OPrAHM3AL&lf7 fl0 CTAH~APTH3Al&lWORGANISATION INTERNATIONALE DE NORMALISATION Furniture - Assessment of surface resistance to cold liquids Ameublemen t - Evaluation de Ia ksistance des surfaces aux liquides froids First edition - 1979-09-01 UDC 646.4: 620.193 Descriptors : furnishing, furniture, tests, determination, resistance to domestic products, liquids. Ref. No. ISO 4211-1979 (E) Price based on 4 pages SIST EN 12720:1997



Foreword ISO (the International Organization for Standardization) is a worldwide federation of national Standards institutes (ISO member bodies). The work of developing Interna- tional Standards is carried out through ISO technical committees. Every member body interested in a subject for which a technical committee has been set up 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. International Standard ISO 4211 was developed by Technical Committee ISO/TC 136, Furniture, and was circulated to the member bodies in July 1977. lt has been approved by the member bodies of the following countries : Australia India Austria Iran Bulgaria Israel Czechoslovakia Italy Denmark Japan France Mexico Germany, F.R. Norway Hungary Poland The member body technical gro unds of the following country expressed disapproval sf the document on Romania South Africa, Rep. of Spain Sweden United Kingdom Y ugoslavia Netherlands 0 International Organkation for Standardkation, 1979 Printed in Switzerland SIST EN 12720:1997



INTERNATIONALSTANDARD ISO 4211-1979 (E) Furniture - Assessment of surface resistance to cold liquids ‘l Scope and field of application This International Standard specifies a method of assessment of surface resistance to cold liquids and relates to the surfaces of finished furniture. lt tan also be applied to test Panels with a size sufficient to meet the requirements of the test and of the same material and finished in the identical manner as the finished furniture. The type and number of test liquids and the test periods (selected from the table in clause 5) shall be stated in require- ment specifications or shall be agreed upon between purchaser and supplier. A selection of suitable test liquids is given in the annex, but others may be used, if necessary. 3.6 Diffuse light Source, providing evenly diffused light giving an illumination on the test area between 1 000 and 5 000 IX. This may either be diffused daylight or be diffused artificial lig ht. NOTE - The daylight should be unaffected by surrounding trees, buildings, etc. When artificial light is used, it is recommended that it should have a correlated colour temperature of 5 000 to 6 550 K and an R, greater than 92. 3.7 Direct light Source : 60 W frosted bulb so screened that light reaches the test area only from the bulb and that the bulb is not in direct view of the tester. The angle between the horizontal and a line between the bulb and the area under examination shall be 30 to 60°. NOTE - One suitable way to perform this test is to use a viewing ~uhinet as shown in figure 1. 2 Principle Application of a liquid to a surface by means of saturated Paper, covered by a glass basin. After a specified period of time, removal of the Paper, washing and drying of the surface and examination for darnage (discoloration, Change in lustre, blistering, etc.). Assessment of the test results in terms of a descriptive numerical rating Code. 3.8 Test liquid, temperature 23 & 2 OC. 3.9 Deionized or distilled water, temperature 23 + 2 OC. 3.10 Cleansing Solution containing 15 ml/l of the cleansing agent (3.11) in water (3.9). This Solution shall be freshly prepared on each occasion. 3.11 Cleansing agent, of the following composition : 3. Equipment and products 3.1 Discs, diameter approximately 25 mm, of filter Paper . with a grammage of 400 to 500 g/m2. 3.2 Glass basins with ground edges and without lips, external diameter approximately 40 mm, height approximately 25 mm. - 12,5 % (mlm) of a sodium primary (CIO - C14) alkyl aryl sulphonate; - 12,5 % (mlm) polyethoxylated derivatives of primary or secondary (Cs - C16) alcohols with 5 to 15 ethoxylated groups having a cloud Point of 25 to 75 OC in 1 % (mlm) aqueous Solution (determination of cloud Point is described in ISO 1065); - 5,0 % (mlm) ethanol; 3.3 Tweezers. - 70 % (mlm) water (3.9). 3.4 Filter Paper. 3.5 Soft, absorbent cloths. The cleansing agent shall be stored in a glass bottle in a cool, dark place and should be used within 1 year of the day of preparation. SIST EN 12720:1997



ISO 4214-1979 (E) 4 Preparation and csnditisning sf test units Unless otherwise agreed, the unit shall be allowed to age and shall then be conditioned. For ageing, the unit shall be stored at a temperature not less than 15 OC with free access of air. Ageing including condition- ing before test shall not be less than four weeks. Conditioning should begin one week before testing and should be carried out in air at a temperature of 23 + 2 OC and relative humidity of 50 & 5 %. The test surface shall be substantially flat and of a size suffi- cient to meet the requirements of clause 6 regarding the Separation of the filter Paper discs. lt is recommended that a sufficient area be prepared to allow for extra tests if required. The test surface shall be carefully wiped w
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