{
  "url": "https://openlegislation.uk/eu-regulation-2011-1007/annex-VIII/chapter-2/division-1/division-I/division-I.8/division-I.8.2",
  "json_url": "https://openlegislation.uk/eu-regulation-2011-1007/annex-VIII/chapter-2/division-1/division-I/division-I.8/division-I.8.2.json",
  "legislation": "eur/2011/1007",
  "legislation_title": "Regulation (EU) No 1007/2011 of the European Parliament and of the Council of 27 September 2011 on textile fibre names and related labelling and marking of the fibre composition of textile products and repealing Council Directive 73/44/EEC and Directives 96/73/EC and 2008/121/EC of the European Parliament and of the Council (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2011-1007",
  "path": "annex/VIII/chapter/2/division/1/division/I/division/I.8/division/I.8.2",
  "kind": "division",
  "number": "I.8.2",
  "heading": null,
  "text": "Calculation of percentage of insoluble component on clean, dry mass basis, with adjustment by conventional factors and, where appropriate, correction factors for loss of mass during pre-treatment:\nP 1 A % = 100 P 1 1 + a 1 + b 1 100 P 1 1 + a 1 + b 1 100 + 100 − P 1 1 + a 2 + b 2 100 where\nP1A% is the percentage of insoluble component adjusted by agreed allowances and for loss in mass during pre-treatment,\nP1 is the percentage of clean dry insoluble component as calculated from the formula shown in I.8.1,\na1 is the agreed allowance for the insoluble component (see Annex IX),\na2 is the agreed allowance for the soluble component (see Annex IX),\nb1 is the percentage loss of insoluble component caused by pre-treatment,\nb2 is the percentage loss of soluble component caused by pre-treatment.\nThe percentage of the second component is P2A % = 100 – P1A %.\nWhere a special pre-treatment has been used, the values of b1 and b2 shall be determined, if possible, by submitting each of the pure fibre constituents to the pre-treatment applied in the analysis. Pure fibres are those free from all non-fibrous material except that which they normally contain (either naturally or because of the manufacturing process), in the state (unbleached, bleached) in which they are found in the material to be analysed.\nWhere no clean separate constituent fibres used in the manufacture of the material to be analysed are available, average values of b1 and b2 as obtained from tests performed on clean fibres similar to those in the mixture under examination, shall be used.\nIf normal pre-treatment by extraction with light petroleum and water is applied, correction factors b1 and b2 may generally be ignored, except in the case of unbleached cotton, unbleached flax (or linen) and unbleached hemp, where the loss due to the pre-treatment is conventionally taken as 4 %, and in the case of polypropylene, where it is taken as 1 %.\nIn the case of other fibres, losses due to the pre-treatment are conventionally disregarded in calculations.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2011/1007/annex/VIII/chapter/2/division/1/division/I/division/I.8/division/I.8.2",
    "retrieved_at": "2026-11-01T14:49:51.401191+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}