h2-92 48519030013450 T NTERNATIONAL STANDARD TSO 2646 H-37-03 Wool - Measurement of the length of fibres processed on the worsted system, using a fibre diagram machine Laine--Mesuragede la longueurdes fibres travailles sursysteme《lainepeignee》,parun appareildonnantungraphique dedistributiondelongueurdesfibres First edition -- 1974-07-01 ISO2646-1974 (E) UDC 677.3-49 : 678.674-49 : 531.716 : 621.3.082.722,55 Ref.No.ISO 2646-1974 (E) Descriptors:fibres,animal fibres,wool fibres,dimensional measurement,length. Price based on 5 pages COPYRIGHT2OOOInter Organ Standa Information Handling Services, 2000 485190300134511 2-992 FOREWORD Iso(the International Organization for Standardization)is a worldwidefederation of national standards institutes (IsO Member Bodies). The work of developing International Standards is carried out through ISO Technical Committees. Every MemberBodyinterestedinasubjectforwhichaTechnical Committeehasbeenset up has the right to be represented onthat Committee.Internationalorganizations, governmental and non-governmental, in liaison with Iso, also take part in the work. DraftInternational Standards adopted bytheTechnical Committeesarecirculated to the Member Bodies for approval before their acceptance as Internationa! Standards by the Iso Council. InternationalStandardISO2646wasdrawnupbyTechnical Committee ISO/TC 38, Textiles, and circulated to the Member Bodies in April 1972. It has been approved by the Member Bodies of the foilowing countries : Belgium Iran South Africa, Rep. of Brazil Ireland Spain Canada Israel Sweden Chile Italy Switzerland Czechoslovakia Japan Thailand Egypt, Arab Rep. of NewZealand Turkey Finland Pakistan United Kingdom Germany Poland U.S.S.R. Hungary Portugal India Romania The Member Body of the following country expressed disapproval of the document : France This International Standard is based on the IWTo Test Method 16-67, drawn up by the InternationalWoolTextileOrganization(IWTO) InternationalOrganizationforStandardization,1974 Printed in Switzerland. Information Handling Services, 2000 h2-9h92 EO6TSh 25hET00 3 INTERNATIONALSTANDARD ISO2646-1974(E) Wool -- Measurement of the length of fibres processed on the worsted system, using a fibre diagram machine 1SCOPEANDFIELDOFAPPLICATION 4.2 Fibre diagrammachine This International Standard specifies a method for the The main parts and accessories are as follows : measurement of the length .of wool fibres using a fibre diagram machine. The method is applicable to combed a) transparent recording table of overall width 22,9 cm slivers processed on the worsted system. For slivers betweenedges; containing two or more fibres of different dielectric b) input platform with velvet strip for tensioning fibre constants(forexamplewoolandpolyester)andlength draw; distributions, the results may not be an accurate reflection of the actual fibre-length distribution of the top. c) R.F. bridge electrode system working into tuned amplifier giving linear output; d) optical system giving deflection or recording image 2 REFERENCE proportionalto massoffibrebetween electrodes; Iso 139,Textiles-- Standard atmospheres for conditioning e)tension clip of massbetween1,5and3g; and testing. f) small brush (see figure 1); g)recording paper graduated in millimetres 3PRINCIPLE horizontally and vertically from 0,20 cm. A length of sliver under test is folded in two and squared A suitable machine is described in the annex. off. A band of fibre ends is sealed to a plastic strip and withdrawn. The draw is then fed through the electrodes of 5 ATMOSPHEREFORCONDITIONINGANDTESTING a capacitance bridge in the apparatus and the position of a spot of light marked on recording paper, thus giving an The fibres shall be conditioned and the test shall be estimate ofthecumulativelengthdistribution(hauteur) conducted in one of the standard atmospheres defined in ISO139. 4 APPARATUS 6TESTSPECIMENS 4.1 Sealing unit comprises the following main parts and 6.1 Number of specimens Theunit acces