BS ISO 633:2019 pdf download – Cork — Vocabulary
This document defines cork as a raw material for the industry, as well as the terms to be used in describing the different forms in which cork can be found. This document also indicates the terms and definitions concerning its main products, some of the operations to which cork can be submitted and anomalies that can be associated with it.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
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3.1 Cork
3.1.1 Constitution
3.1.1.1
cork
protective layer of bark which, periodically, can be harvested from the trunk and branches of the cork oak (Quercus suber L.) constituting the raw material for cork products
3.1.1.2
layer
vein
suberous tissue produced during a one yearly growth cycle of the cork oak, comprising a high-coloured large softer band formed at the beginning of the year, the spring layer, and a thinner darkish band grown towards the end of that year, the autumn layer
Note 1 to entry: The number of layers formed from the beginning of the cork’s growth determines the number of years of the cork bark, i.e. its “age”.
3.1.1.3
lenticel
radial canals which allow essential gaseous exchanges between the tree tissues and the atmosphere
3.1.1.4
pore
opening of the lenticels (3.1.1.3), in cross-section
Note 1 to entry: The surface of the lenticels in cross-section is called porosity. This surface is taken into account when visually classifying the cork stoppers (3.4.1.3).
3.1.2.4
boiled cork waste
low quality second reproduction cork (3.1.2.2.2) who has undergone boiling (3.3.2) process, making it suitable as raw material for the production of cork granules (3.6.1.3) for the cork stopper industry (3.3.9)
3.1.2.5
deadwood cork
virgin cork (3.1.2.1) or reproduction cork (3.1.2.2) stripped from recently felled trees or from cut off branches deriving from maintenance or prophylactic pruning
3.1.2.5.1
hatchet virgin cork
adze virgin cork
virgin cork (3.1.2.1), originally obtained either by stripping (3.1.1.8) the bark after cutting it with an adze or a hatchet, or by mechanical stripping along the axis of the branches, still showing fragments of inner bark and/or lignified tissue
3.1.2.6
cork piece
piece of virgin cork (3.1.2.1) or reproduction cork (3.1.2.2), which has an area less than 400 cm 2 and which is longer than 55 mm
3.1.2.7
cork wedge
part of the cork (3.1.1.1) formed at the base of the trunk not usable by the cork industry for transformation by either shaping or granulation
Note 1 to entry: This type of cork is called “calços” in Portugal and “zapatas” in Spain.
3.1.2.8
raw cork
virgin cork (3.1.2.1) or reproduction cork (3.1.2.2) which has not undergone any treatment after stripping (3.1.1.8)
Note 1 to entry: Raw cork keeping the shape of the trunk and branches is called “cannon”.
Note 2 to entry: The designation “burnt” is added to raw cork when it is stripped from trees scorched by fire (see 3.1.3.3).
3.1.3 Cork anomalies
3.1.3.1
anomaly
visual point of imperfection that does not impede the use of the cork (3.1.1.1) as raw material by the cork stopper industry (3.3.9)
3.1.3.2
shot cork
cork (3.1.1.1) with holes produced by bullets or pellets
Note 1 to entry: This is a point defect that can be eliminated.
3.1.3.3
scorched cork
burnt cork
cork (3.1.1.1) scorched or burnt by fire, not usable by the cork stopper industry (3.3.9) for transformation by either shaping or granulation
3.1.3.4
cork with worm holes
cork (3.1.1.1) showing galleries caused by larvae of Coroebus undatus Fabr, generally following the same layer
Note 1 to entry: These screw-shaped galleries spread around trunk and/or branches. The gallery diameters grow as the larvae grow and the galleries are blocked by the larvae excrements.
3.1.3.5
cork bored by birds
cork (3.1.1.1) with bore holes produced by birds (for example, woodpecker)
Note 1 to entry: This is a point defect that can be eliminated.
3.1.3.6
cork with a dry year
cork (3.1.1.1) showing an autumn lignified layer with an abnormal width, that can lead to a partial or total separation of the cork layers
3.1.3.7
folded cork
cork (3.1.1.1) showing two autumn layers touching each other that may lead to a local separation of layers in the suberous tissue.BS ISO 633 pdf download.