ISO/TC 87 - Cork

This document specifies the test method to determine the capillarity of cylindrical cork stoppers. It consists in measuring the capillary rise by dipping in a hydro-alcoholic solution containing a dye. Two methods using the same procedure but different concentrations of hydro-alcoholic solutions are described. It is applicable to all types of cylindrical cork stoppers, ready for use.

This document specifies a test method to measure the global migration of cork stoppers. It is applicable to all types of cork stoppers that are ready to use, simulating the real conditions of use. This includes all kind of cork stoppers (completely or partially inserted in the bottle neck). A bottle with an adequate finish is used to carry out the test.

This document defines a test method for the detection, qualification and possible assessment of odours/flavours exogenous to cork bark selected as bottling product in contact with beverages, still, sparkling and sparkling wines, alcohols and spirits, beers and ciders. This document is applicable to: — cork bark selected as bottling product in all its forms; — all cork components of cork stoppers: granules, discs, bodies and shanks; — all types of cork stoppers, semi-finished (shaped), semi-finished (semi-finished stoppers possibly washed and possibly colmated and/or coated) or ready for use (semi-finished stoppers, possibly branded and surface treated).

This document specifies a method of sampling for the determination of moisture content of packed cork, either virgin cork, raw reproduction cork, burnt cork, boiled reproduction cork and raw cork waste.

This document specifies a sampling method for the determination of moisture content of granulated cork, broken cork and crushed cork.

This document specifies a method for determination of the moisture content of packed cork, either virgin cork, raw reproduction cork, burnt cork, boiled reproduction cork and raw cork waste.

This document specifies the classification and properties of granulated cork and cork powder before pressing, as well as the methods of packing.

This document specifies a method to obtain granule size distribution of granulated cork by mechanical sieving.

ISO 1216:2017 defines when boiled reproduction cork is considered to be commercially dry. In addition, it classifies the different possibilities of grading boiled reproduction cork in terms of thickness, specifies its visual classification, packing and marking and defines the acceptable loss in transit.

ISO 4709 gives a classification system for composition cork intended to be used as gaskets in the mechanical industry. It provides a means for specifying or describing the relevant properties. Since not all properties that contribute to gasket performance are included, the use of this system is limited to the selection of materials in accordance with specified requirements.

ISO 4708:2017 specifies test methods to determine the characteristics of agglomerated composition cork and rubbercork to be used as gaskets in the mechanical industry. The following characteristics are considered: - thickness, - apparent density, - tensile strength, - compressibility and recovery, - flexibility, - resistance to boiling water, - behaviour in fluids.

ISO 3867:2017 specifies test methods to determine the following characteristics of the composition cork intended to be used as a joint filler of expansion joints of concrete or other construction materials: - apparent density; - expansion in water; - compression; - recovery; - extrusion; - water absorption. These test methods apply to agglomerated cork joint filler with a nominal thickness ranging from 6,3 mm to 25 mm.

ISO 3869:2017 specifies the characteristics of composition cork intended to be used as expansion joint filler between concrete elements or other construction products.

ISO 2190:2016 specifies the reference method for determination of the moisture content of granulated cork.

ISO 10718:2015 specifies a method to enumerate the colony-forming units of yeasts, moulds and bacteria which can exist on cork stoppers and in an alcoholic solution, and which, under certain conditions, can be extracted during the 3 months following delivery. ISO 10718:2015 applies to all types of ready-to-use cork stoppers, submitted to a sanitation process and packaged in properly aseptic and hermetic conditions. ISO 10718:2015 specifies the limit values of the colony-forming units of yeasts, moulds and bacteria which can be found on cork stoppers submitted to the test procedures included in this standard.

ISO 2031:2015 specifies a method of determining the apparent bulk density of granulated cork, as defined in ISO 633.

ISO 1215:2015 applies to commercially dry virgin cork, raw reproduction cork, ramassage, gleanings, burnt cork, corkwaste, boiled cork pieces, and boiled corkwaste and specifies the conditions of packaging for each type.

ISO 7322:2014 specifies test methods for the determination of the following characteristics of composition cork: thickness, apparent density, tensile strength, compressibility and recovery, resistance to boiling water. ISO 7322:2014 is applicable to the product in sheet or roll form.

ISO 20752:2014 specifies a test method to determine releasable 2,4,6-trichloroanisol (TCA) from cork stoppers. It is applicable to all types of cork stoppers and all their cork constituents.

ISO 16420:2013 defines, for each type of ready-to-use, cylindrical cork stopper for still wines (colmated or non-colmated natural cork stoppers, agglomerate cork stoppers, 1 + 1 stoppers), a set of specifications corresponding to different tested parameters. For all parameters, this set of specifications comprises a proposal for the number of stoppers to be tested (incremental sample); an acceptable quality level and, for certain parameters: nominal value or values; specification limits (or "tolerances"). For cork stoppers for still wines, and for certain parameters, the concept of a range is introduced, with 3 decreasing levels of requirements: upper range; standard range; entry level. It is, therefore, up to the consumer to specify, for each batch of cork stoppers ordered, what their needs are based on these three specification levels (or ranges). It is also up to each supplier, besides a commercial reference for each batch of cork stoppers, to define which range applies in terms of the requirements in ISO 16420:2013. The sampling method, as well as the possible repetitions of incremental samples are defined by the sampling standard (currently being drafted) or defined jointly by the consumer and the supplier. The stoppers tested shall comply with the requirements of ISO 9727.

ISO 16419:2013 applies to semi-elaborated natural cork stoppers and colmated natural cork stoppers at the definitive dimensions stage, and finished natural cork stoppers and colmated natural cork stoppers ready to use. It describes the anomalies of cork stoppers that can be detected by visual examination by the manufacturer or the end-user. These anomalies, according to their size, can have functional or not functional consequences being able to alter, more or less, the cork stoppers' sealing capacity. On the basis of a common sampling example, ISO 16419:2013 proposes, for all these anomalies, some specifications for stoppers.

ISO 17727:2012 describes the quality control sampling plans for the receipt and shipping of ready-to-use cylindrical stoppers (flush with cork mouth finish) in semi-worked or finished cork used for still wines. These sampling plans apply to the following parameters, for which a standardized analysis method is available. These are the parameters which are applicable to: physical tests: dimensions, mass and apparent density for agglomerate cork stoppers, moisture content, dimensional recovery after compression, extraction force, liquid tightness and dust content (see ISO 9727); chemical tests: analysis of oxidizing residues (see ISO 21128); microbiological tests: enumeration of colony-forming units of yeasts, moulds and bacteria capable of growth in an alcoholic medium (see ISO 10718); sensory analysis (see ISO 22308); the analysis of releasable 2, 4, 6-trichloroanisole (TCA) (see ISO 20752).

ISO 9149:2010 specifies the requirements of cork wallcoverings in roll form to be used within buildings. ISO 9149:2010 contains provisions for the evaluation of conformity of the product. It also includes requirements for marking, packaging and labelling.

ISO 2219:2010 specifies the requirements for factory-made products of expanded cork, which are used for the thermal insulation of buildings. The products are made with granulated cork agglomerated without additional binders and are delivered as boards without facings. ISO 2219:2010 describes product characteristics and includes procedures for testing, evaluation of conformity, marking, labelling and packaging. Products covered in ISO 2219:2010 are also used in prefabricated thermal insulation systems and composite panels; the performance of systems incorporating these products is not covered. ISO 2219:2010 does not specify the required level of a given property to be achieved by a product to demonstrate fitness for purpose in a particular application. The levels required for a given application are to be found in regulations or non-conflicting standards. Products with a declared thermal resistance lower than 0,25 m2×K/W, at 10 °C, or a declared thermal conductivity greater than 0,060 W/(m×K), at 10 °C, are not covered in ISO 2219:2010.

ISO 8724:2009 specifies the characteristics of cork decorative panels for covering internal walls.

ISO 9727-1:2007 specifies a test method for determining the dimensions of cylindrical cork stoppers, namely diameter, length and, in some cases, ovalisation. It is applicable to all types of cylindrical cork stoppers as defined in ISO 633, ready for use or semi-worked.

ISO 9727-4:2007 specifies a test method for determining the percentage of diameter recovery of cylindrical cork stoppers, after compression. It is applicable to all types of cylindrical cork stoppers ready for use or semi-worked, intended to be completely inserted in the bottle neck (straight cork stoppers).

ISO 9727-2:2007 specifies a test method for measuring the mass of cylindrical cork stoppers ready for use or semi-worked, totally or partially made of agglomerated cork, and calculating the apparent density of cylindrical cork stoppers ready for use or semi-worked, totally made of agglomerated cork.

ISO 9727-3:2007 specifies a test method for determining the humidity content of cylindrical cork stoppers, ready for use or semi-worked.

ISO 9727-5:2007 specifies a test method for determining the maximum force necessary to extract a cylindrical cork stopper. It is applicable to all types of cylindrical cork stoppers ready for use, intended to be completely inserted in the bottle neck (straight cork stoppers).

ISO 9727-6;2007 specifies a test method for determining the liquid tightness of a cylindrical cork stopper. It is applicable to all types of cylindrical cork stoppers ready for use, intended to be completely inserted in the bottle neck (straight cork stoppers).

ISO 9727-7:2007 specifies a test method for determining the dust content of a cylindrical cork stopper. It is applicable to all types of cylindrical cork stoppers ready for use, intended to be completely inserted in the bottle neck (straight cork stoppers).

ISO 21128:2006 specifies an iodometric titration method for determining the oxidizing residues released by cork stoppers ready to use.

ISO 2066:2004 specifies a method for determining the moisture content of agglomerated cork.

ISO 3850:2004 describes a method for determining the apparent density of agglomerated cork.

This International Standard specifies a method for the determination of the dimensions of agglomerated cork floor tiles or slabs, and the deviation from squareness and from straightness of their edges. NOTE 1 Alternatively, methods described in EN 427 and EN 428 may be used. NOTE 2 The term "tiles" used in this International Standard covers either tiles or slabs.

This International Standard establishes the minimum requirements for agglomerated composition cork in the sheet form and specifies the requirements for sampling, packaging and marking.

This International Standard specifies the characteristics of cylindrical cork stoppers for sparkling wines and gasified wines.

For the purpose of this standard the definitions in ISO 633 and the definition given herein apply. The tiles shall be tested as specified in ISO 354 taking into account particulars which are defined. Constitutes a technical revision of the first edition.

The following characteristics are determined: dimensions and squareness, apparent density, tensile strength, initial and residual indentation, ash content and resistance to boiling hydrochloric acid. Replaces the first edition of which this constitutes a technical revision.

This document specifies a test method to measure the global migration of cork stoppers. It is applicable to all types of cork stoppers that are ready to use, simulating the real conditions of use. This includes all kind of cork stoppers (completely or partially inserted in the bottle neck). A bottle with an adequate finish is used to carry out the test.

ISO 4708:2015 spécifie les méthodes d'essai pour déterminer les caractéristiques de l'aggloméré composé de liège et du liège et caoutchouc destinés à la fabrication de joints pour industries mécaniques. Les caractéristiques suivantes sont prises en considération: - épaisseur, - masse volumique apparente, - résistance à la traction, - compressibilité et récupération, - flexibilité, - résistance à l'eau bouillante, - comportement dans les fluides.

ISO 2385:2015 applies to packed cork and specifies the method of sampling virgin cork, raw reproduction cork, ramassage, gleanings, burnt cork, boiled reproduction cork and raw corkwaste for the determination of moisture content.

ISO 2386:2015 specifies a method for determination of the moisture content of packed cork, either virgin cork, raw reproduction cork, ramassage, gleanings, burnt cork, boiled reproduction cork or raw corkwaste.

ISO 9986:2014 specifies requirements for test methods as regards composition cork for the manufacture of outsoles of shoes and boots.

ISO 20752:2007 specifies a test method to determine realisable 2,4,6-trichloroanisol (TCA) from cork stoppers. ISO 20752:2007 is applicable to all types of cork stoppers.

ISO 22308:2005 defines a test method for detecting, qualifying and eventually evaluating the exogenous odours/flavours of cork stoppers. ISO 22308:2005 is applicable to all kinds of cork stoppers, ready for use, designed to be in contact with alcoholic drinks.

ISO 3813:2004 specifies the requirements for cork floor coverings made from agglomerated composition cork supplied in tile form which are designed to be used with a factory finish and/or an in situ finish.

ISO 10106:2003 specifies a test method to measure the global migration of cork stoppers. It is applicable to all types of cork stoppers that are ready to use.

ISO 10718:2002 specifies a method to enumerate the colony-forming units of yeasts, moulds and bacteria which can exist on cork stoppers and can grow in an alcoholic solution under certain conditions. ISO 10718:2002 applies to cork stoppers which were submitted to the usual sanitizing procedures.