ISO INTERNATIONAL 4603 STANDARD Second edition 1993-11-15 Textile glass -- Woven fabrics Determination of thickness Verre textile-Tissus-Détermination de I'épaisseur ISO Referencenumber ISO4603:1993(E) ISO4603:1993(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be and non-governmental, in liaison with isO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 4603 was prepared by Technical Committee ISO/TC 61, Plastics, Sub-Committee SC 13, Composites and reinforce- mentfibres. This second edition cancels and replaces the first edition (ISO 4603:1978), which has been technically revised. ?ISO1993 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without per mission in writing from the publisher. International Organization for Standardization Case Postale 56.CH-1211Geneve20·Switzerland Printed in Switzerland INTERNATIONALSTANDARD ISO4603:1993(E) Textile glass Woven fabrics Determination of thickness Scope 3 Definition This International Standard specifies a method of de- For the purposes of this International Standard, the termining the thickness of a textile-glass fabric having following definition applies. a thickness of 0.1 mm or more.1) 3.1 thickness of a textile-glass fabric: The per This method is applicable to woven fabrics of single pendicular distance,in millimetres,between the sur- or folded (plied)yarns (continuous-filament textile- facesofthefabric,measuredataspecifiedpressure: glass products or staple-fibre textile-glass products), rovings, textured yarns or combinations of these 4 Principle yarns. For woven fabrics made from staple-fibre or textured Measurement of thickness of conditioned test speci yarns, including those with such yarns in the weft or mens under a known pressure by means of a suitable warponly.this standard alsoenables apparatus. compressibility to be determined. 5 Apparatus 5.1Dead-weightmicrometer,withtwogroundand lapped circular surfaces, flat to within 0,001 mm and 2 Normative references parallel to within 0,003 mm. The faces shall move on an axis perpendicular to themselves. The measuring The following standards contain provisions which, spindle shall be vertical. The frame of the micrometer through reference in this text, constitute provisions shall be of such rigidity that a force of 15 N applied to of this International Standard. At the time of pub- the housing,out of contact with the pressure-foot, lication, the editions indicated were valid. All stan- will produce a deflection of the frame not greater than dardsaresubject to revision, andparties to O,o1 mm, as indicated on the micrometer read-out. agreements based on this International Standard are The calibration gauge used to check the instrument encouraged to investigate the possibility of applying shall be accurate to within± 0,001 mm. the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers The types of micrometer described in 5.1.1 and 5.1.2 of currently valid International Standards. maybeused. ISO139:1973,Textiles-Standard atmospheres for 5.1.1 Electronic micrometer. conditioning and testing. A suitable electronic micrometer with a digital read- Iso291:1977,Plastics-Standard atmospheres for out to 0,001 mm. conditioning and testing. 5.1.2 Dial-gauge micrometer. IS02602:1980,St