{
  "url": "https://openlegislation.uk/eu-regulation-2011-1007/annex-VIII/chapter-3/division-1/division-IV/division-2",
  "json_url": "https://openlegislation.uk/eu-regulation-2011-1007/annex-VIII/chapter-3/division-1/division-IV/division-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/3/division/1/division/IV/division/2",
  "kind": "division",
  "number": null,
  "heading": "VARIANT No 4",
  "text": "Consider the case of a fibre mixture which when qualitatively analysed gave the following components: carded wool, viscose, unbleached cotton.\nSuppose that using variant 4, that is successively removing two components from the mixture of one single specimen, the following results are obtained:\n1.. Dry mass of the specimen after pre-treatment (m) = 1,6000 g\n2.. Dry mass of the residue after treatment with alkaline sodium hypochlorite (viscose + cotton) (r1) = 1,4166 g\n3.. Dry mass of the residue after the second treatment of the residue r1 with zinc chloride/formic acid (cotton) (r2) = 0,6630 g\nTreatment with alkaline sodium hypochlorite does not entail any loss in mass of viscose, while unbleached cotton loses 3 %, therefore d1 =1,00 and d2 = 1,03.\nAs a result of treatment with formic acid-zinc chloride, the mass of cotton increases by 4 %, so that d3 = 1,03 × 0,96 = 0,9888, rounded to 0,99, (d3 being the correction factor for the respective loss or increase in mass of the third component in the first and second reagents).\nIf the values obtained by chemical analysis and the correction factors are substituted in the formulae given in I.8.1.4, the following result is obtained:\nP2% (viscose) = 1,00 × (1,4166/1,6000) × 100 – (1,00/1,03) × 41,02 = 48,71 %\nP3% (cotton) = 0,99 × (0,6630/1,6000) × 100 = 41,02 %\nP1% (wool) = 100 – (48,71 + 41,02) = 10,27 %\nAs has already been indicated for Variant 1, these percentages must be corrected by the formulae indicated in point I.8.2.\nP1A% (wool) = 10,27 × [1 + (17,0 + 0,0)/100)]/[10,27 × (1 + (17,00 + 0,0)/100) +48,71 × (1 + (13 + 0,0)/100) + 41,02 × (1 + (8,5 + 4,0)/100)] × 100 = 10,61 %\nP2A% (viscose) = 48,71 × [1 + (13 + 0,0)/100] / 113,2057 × 100 = 48,62 %\nP3A% (cotton) = 100 – (10,61 + 48,62) = 40,77 %\nThe raw material composition of the mixture is therefore as follows:\nviscose\n48,6 %\ncotton\n40,8 %\nwool\n10,6 %\n—\n100,0 %",
  "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/3/division/1/division/IV/division/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."
}