1139 NTERNATIONAL STANDARD TSo INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEKAYHAPOIHA OPTAHW3ALIW IO CTAHIAPTW3ALIWIH·ORGANISATION INTERNATIONALE DE NORMALISATION Textiles - Designation of yarns First edition -1973-09-15 ISO 1139-1973 (E) UDC 677.017.272.2 Ref.No. ISO 1139-1973 (E) Descriptors : textiles, yarns, vocabulary, symbols, designation. Price based on 5 pages FOREWORD IsO (the International Organization for Standardization) is a worldwide federation of national standards institutes (IsO Member Bodies). The work of developing International Standards is carried out through Iso Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with isO, also take part in the work. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standardsby the isO Council. Prior to 1972, the results of the work of the Technical Committees were published as Iso Recommendations; these documents are now in the process of being transformed into International Standards. As part of this process, International Standard ISO 1139 replaces ISO Recommendation R 1139-1969 drawn up by Technical Committee ISO/TC 38,Textiles. The Member Bodies of the following countries approved the Recommendation : Australia India Portugal Belgium Iran Romania Canada Ireland South Africa, Rep. of Chile Israel Spain Czechoslovakia Japan Sweden Denmark Korea, Rep. of Switzerland Egypt, Arab Rep. of Netherlands Turkey France New Zealand United Kingdom Germany Norway U.S.A. Hungary Poland U.S.S.R. The Member Bodies of the following countries s expressed disapproval of the Recommendation on technical grounds : Brazil Italy International Organization for Standardization,1973 Printed in Switzerland ISO1139-1973 (E) INTERNATIONALSTANDARD Textiles - Designation of yarns 0 INTRODUCTION a) yarn notation starting from the linear density of the single yarn : it may be referred to as single-to-fold The general introduction of the Tex System for expressing notation; the linear density of yarns requires standardization of the notation for yarn construction. In designating yarns it has b) yarn notation starting from the linear density of the been customary -- and it remains desirable - to reflect in a resultant yarn : it may be referred to as fold-to-single condensed form details of the components of a yarn notation. including values of the linear densities, directions and The symbols used in both systems are identical. The amounts of twist,number of folds, etc.of these differences are in the order of presentation, the use of the components and/or characteristics of the yarn resulting multiplication sign (X) in the single-to-fold notation, and of from this construction,such as its linear density indicated the solidus (/) in the fold-to-single notation. as resultant linear density. The resultant linear density of folded and/or cabled Distinction between these two methods does not apply to single spun yarns, monofilaments and multifilaments yarns-in some caseswith strong twisted filament yarns - will generally differ from the sum of the linear without twist, nor to multiple wound yarns. The notation densities of the components and, even when starting from of these yarns is given under the heading of the first method (see 4.1 and 4.2). the same component yarns, using the same direction and amount of twist, number of folds, etc., yarns with different It is hoped that ultimately one method may be used to the resultant linear densities may beproduceddue to exclusion of the other. In fact, ISO 858, dealing with yarns differences in conditions during manufacturing of yarns, for fishing nets, employs only the single-to-fold method, such as yarn tensions, types of machine used, moisture although giving, in the abbre