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Ref. No.: ISOIR 633 - 1967 (E)
IS0
1 N T E R N AT1 ON AL
OR GAN I Z AT1 O N
FOR S TA N DAR DI Z AT I O N
IS0 RECOMMENDATION
R 633
CORK
GLOSSARY
1st EDITION
November 1967
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 633, Cork - Glossary, was drawn up by Technical Committee
ISO/TC 87, Cork, the Secretariat of which is held by Repartiçao de Normalizaçao (IGPAI).
Work on this question by the Technical Committee began in 1958 and led, in 1963, to the
adoption of a Draft IS0 Recommendation.
In June 1964, this Draft IS0 Recommendation (No.733) was circulated to all the IS0
Member Bodies for enquiry. It was approved, subject to a few modifications of an editorial
nature, by the following Member Bodies:
Argentina France Netherlands
Australia Germany Poland
Brazil Israel Portugal
Chile Italy United Kingdom
Colombia Japan Yugoslavia
Czechoslovakia Morocco
One Member Body opposed the approval of the Draft:
Spain.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in November 1967, to accept it as an IS0 RECOMMENDATION.
CONTENTS
Page
Introduction. . 3
1. Cork. . 3
2. Raw cork. . 3
3. Manufactured cork . 4
4. Worked cork. . 5
Index . 8
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ISO/R 633 - 1967 (E)
IS0 Recommendation R 633 November 1967
CORK
GLOSSARY
INTRODUCTION
The purpose of this IS0 Recommendation is to define cork and to determine and define the terms
to be used in describing the various states in which cork may be found and the principal products
manufactured therefrom.
1. CORK
The suberous parenchyma developed by the subero-phellodermic meristem of the cork tree
(Quercus Suber L.) whose trunks and branches it envelops.
Cork is made up of dead cells, most of them of a prismatic-hexagonal form and radially arranged,
having no meatus in between them and filled with air. The dividing wall between two adjoining
cells is composed of five layers; two of a cellulosic nature, lining the cellular cavities, two thicker
suberized layers enclosing the former ones and an intermediate lignified layer.
2. RAW CORK
Cork having undergone no treatment whatsoever after stripping.
2.1 Virgin cork. Cork constituting the original cover of the trunk and branches.
2.1.1 Summer virgin. Virgin cork obtained from growing trees being stripped for the first time.
2.1.2 Summer virgin (augment). Virgin cork cut from growing trees above the level of a previous
stripping.
2.1.3 Ordinary virgin. Virgin cork stripped from felled trees.
2.1.4 Winter virgin (hatchet). Virgin cork, generally from pruned branches, obtained by strip-
ping the bark after cutting it with an axe along the axis of the branches, along with
fragments of inner bark and/or even lignified tissue.
2.1.5 Winter virgin (adze). Virgin cork, generally from pruned branches, adze-cut transversely
to the axis of the branch and free from inner bark and lignified tissue.
2.1.6 Virgin "flambé". Virgin cork from trees scorched by fire.
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ISO/R 633 - 1967 (E)
2.2 Reproduction cork. Cork formed, after stripping virgin cork, as a result of the regeneration
of the subero-phellodermic meristem in the inactive inner bark the external part of which
forms the back of this cork.
NOTE. - A preliminary sorting operation may be carried out to separate inferior quality reproduction cork.
The product of this quality is known under the name raw refuse.
2.2.1 Reproduction cork (first stripping after virgin) or secundaria. The first mature regenerated
cork.
2.2.2 Reproduction cork (second and subsequent strippings). Regenerated cork coming after the
first mature and regenerated cork.
2.2.3 Reproduction cork or wedges. Reproduction cork growing about the part near the earth,
not collected at the time of normal stripping but later on in a more careful extraction.
2.2.4 Reproduction “Jambé”. Reproduction cork from trees scorched by fire.
NOTE. - Raw refuse coming from reproduction “flambé” is known under the name ruw refuse “flambé”.
U’
2.3 Ramassage. Virgin or reproduction cork from trees, branches or other parts of trees whose
wood and even the bast has rotted away.
2.4 Gleanings or rebusca. Small pieces of virgin or reproduction cork left lying in the oak groves
during normal stripping and collected afterwards.
3. MANUFACTURED CORK (corkwood)
Reproduction cork, boiled, scraped, flattened, selected and where applicable trimmed.
NOTE. - The prepared cork is described as scraped when excess back has been removed by scraping. It is described
as debacked when the whole of the back has been removed.
3.1 Corkwood in planks. Large size pieces of corkwood, the surface area of which is at least
400 cm2, of a quality suitable for further transformation by cutting and trimming.
3.2 Corkwood pieces. Corkwood pieces measuring less than 400 cm2 and of a quality suitable
for further transformation by cutting.
3.3 Corkwood refuse or rebusca. Corkwood of a low quality, not suitable for further transformation
by cutting.
3.4 Corkwaste. Corkwood scraps remaining after the manufacture of cork or its transformation
by cutting.
3.4.1 Common corkwaste. Corkwaste with adherent back (see term 2.2). These wastes may be
packaged separately but are often mixed.
3.4.1.1 Sliced corkwaste. Irregularly shaped corkwaste cut from corkwood in planks during
selection.
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ISO/R 633 - 1967 (E)
3.4.1.2 Trimming corkwaste. Corkwaste of reduced width, obtained from the surfacing or
the trimming of the edges of corkwood in planks.
3.4.1.3 Strip corkwaste.* Strips (see term 4.1.1) or portions of strips not suitable for trans-
formation by cutting, owing to inferior quality, irregular shape or reduced dimensions.
3.4.1.4 Square waste.” Corkwaste obtained when corkwood in planks or corkwood pieces
are transformed into squares.
3.4.1.5 Blocker waste. * Corkwaste from hollow-punch stopper cutting.
3.4.2 Backs. Corkwaste consisting of back (see term 2.2) with adherent suberous tissue of
reduced thickness obtained by removal of cork back.
3.4.3 Debacked waste. Corkwaste from which the back has been removed.
3.4.4 Bellies. Corkwaste consisting of suberous tissue of reduced thickness cut from corkwood
in planks and consisting of the inner portion of the cork (bellies) which was in contact
with the trunk of the tree.
3.4.5 Fine waste. Corkwaste free from backs (see term 2.2) and bellies (see term 3.4.4). These
wastes may be packaged separately but a
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