ISO INTERNATIONAL STANDARD 18938 Secondedition 2014-09-15 Imaging materials Optical discs Care and handling for extended storage Matériaux pour I'image - Disques optiques - Précautions et manipulation pour stockage étendu Reference number IS0 18938:2014(E) ISO @IS02014 Not for Resale IS0 18938:2014(E) COPYRIGHT PROTECTED DOCUMENT @ISO2014 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax +41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved No reproduction networking permited without license from IHS Not for Resale IS0 18938:2014(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Composition of optical discs 4.1 General. .6 4.2 Polycarbonate substrate (plastic) layer. 4.3 Data layer. .6 4.4 Reflective layer 4.5 Protective layers 7 4.6 Adhesive layers. 4.7 Additional layers. ..8 Failure mechanisms .8 5 5.1 General. ..8 5.2 Physical stress. 5.3 Layer sensitivity ..8 5.4 Scratches .9 5.5 Effects of disc play .9 6 Handling techniques. .10 6.1 General. .10 6.2 Flexing. ..10 6.3 Contamination 6.4 Disc enclosures ..10 Identification. .11 7.1 Basic concepts ..11 7.2 Adhesive labels .11 7.3 Printing on optical discs 11 7.4 Thermal printing. .12 7.5 Inkjet printable surface ..12 7.6 Silk screening ..12 7.7 Marking .12 8 Contamination ..12 8.1 Fingerprints, smudges, dirt, dust .12 8.2 Moisture.. .12 8.3 Organic solvents. .13 8.4 Gaseous impurities. ..13 8.5 Consumables. ..13 9 Use environment ..13 9.1 General. .13 9.2 Temperature and humidity ..13 9.3 Water avoidance .14 9.4 Airquality .14 9.5 Light exposure ..14 9.6 Acclimatization .15 9.7 Vibrations. ..15 10 Transportation and shipping ..15 10.1 Enclosures .15 10.2 Cartons. ..15 10.3 Exposure. .16 iii ded by IHS under license with IS ed without license from IHS Not for Resale