ISO 1997:2018

Granulated cork and cork powder - Classification, properties and packing

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

Granulés et poudre de liège — Classification, caractéristiques et emballage

General Information

• Status: Published
• Publication Date: 17-Oct-2018
• ICS: 79.100 - Cork and cork products
• Technical Committee: ISO/TC 87 - Cork
• Drafting Committee: ISO/TC 87 - Cork
• Current Stage: 9060 - Close of review
• Completion Date: 04-Jun-2029

Relations

• Revises: ISO 1997:1992 - Granulated cork and cork powder - Classification, properties and packing
• Effective Date: 03-Jun-2017

Overview

ISO 1997:2018 - "Granulated cork and cork powder - Classification, properties and packing" defines how granulated cork and cork powder are classified and described prior to pressing, and specifies accepted packing methods. The standard ensures consistent reporting of granule size, bulk density, moisture and cork powder content, and sets basic marking and packing requirements for bales, bags and boxes.

Key topics and requirements

• Classification
  • By granule size: determined via mechanical sieving (see ISO 2030 procedures) and expressed as the aperture range between upper and lower sieves.
  • By bulk density: six groups based on apparent bulk density (measured per ISO 2031): 40/50, 50/60, 60/80, 80/100, 100/120, >120 kg/m³.
• Designation
  • Products are designated by granule size (max/min) and bulk density (example: Granulated 1/2 - 40/50).
• Properties
  • Moisture: described as commercially dry when moisture < 10% (measured per ISO 2190). Higher moisture affects bale mass.
  • Cork powder content: granulated cork must contain ≤ 0.5% cork powder across density groups.
• Sampling and testing
  • Sampling follows ISO 2067; size analysis and density tests reference ISO 2030 and ISO 2031 respectively.
• Packing and marking
  • Acceptable packing forms: bales, bags, boxes. Bales should be compressed, covered and reinforced (hooping/baling wire). Packages must show producer/exporter identification and exporting country.

Applications and users

Who uses ISO 1997:2018:

• Cork producers and processors for consistent product specification and quality control.
• Buyers and distributors who need verified granule size, density and moisture data before pressing or use.
• Laboratories and QC teams performing sampling and tests referenced in related ISO methods.
• Packers and logistics providers ensuring compliant compression and marking of cork shipments.

Practical value:

• Facilitates reliable sourcing and specification of granulated cork and cork powder for manufacturing, insulation, composites, sealing materials and other industrial applications where material consistency and packing integrity matter.
• Reduces disputes by standardizing designation, test methods and packing practices.

Related standards

• ISO 633 - Cork - Vocabulary
• ISO 2030:2018 - Granulated cork - Size analysis by mechanical sieving
• ISO 2031 - Granulated cork - Determination of apparent bulk density
• ISO 2067 - Granulated cork - Sampling
• ISO 2190 - Granulated cork - Determination of moisture content

Keywords: ISO 1997:2018, granulated cork, cork powder, classification, bulk density, granule size, packing, sampling, cork standard.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 1997
Third edition
2018-10
Granulated cork and cork powder —
Classification, properties and packing
Granulés et poudre de liège — Classification, caractéristiques et
emballage
Reference number
©
ISO 2018
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 1
4.1 Classification by grain size . 1
4.2 Classification by bulk density . 1
5 Designation . 2
6 Properties . 2
6.1 Granule size . 2
6.2 Bulk density . 2
6.3 Moisture . 2
6.4 Cork powder content . 2
7 Sampling . 2
8 Packing. 2
9 Marking . 2
Bibliography . 3
Foreword
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 technical 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
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
dif
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