ISO INTERNATIONAL STANDARD 2535 Third edition 2001-07-15 Plastics Unsaturated-polyester resins Measurement of gel time at ambient temperature Plastiques-RésinesdepolyestersnonsaturésMesuragedutemps de gelatemperature ambiante Reference number ISO2535:2001(E) ISO @ ISO 2001 ISO 2535:2001(E) Contents Page Foreword.. .iv 1 Scope 1 2 Normative references . 3 Terms and definitions . 4 Principle... 5 Reagents. .2 6 Apparatus.. 7 Procedure ..3 8 Expression of results .. 6 Precision. 10 Test report.. Annex A (normative)Automatic-release apparatus 5 Annex B (normative) Continuous-measurement apparatus.. @ ISO 2001 - All rights reserved ii ISO2535:2001(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnica committees. Each member body interested in a subject for which a technical committee has been established has liaison with isO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 3 Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of International Standard ISO 2535 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosettingmaterials This third edition cancels and replaces the second edition (isO 2535:1997), which has been revised to include four A.2 and B.2) and precision data. Annexes A and B form a normative part of this International Standard iv @ ISO 2001 - All rights reserved