ISO INTERNATIONAL STANDARD 10349-12 First edition 1992-12-15 Photography Photographic-grade chemicals Test methods Part 12: Determination of density Photographie - Produits chimiques de qualite photographique Méthodes d'essai Partie 12: Détermination de la masse volumique Referencenumber ISO 10349-12:1992(E) ISO 10349-12:1992(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 represented on that committee. International organizations, governmental and non-governmental, in liaison with isO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (lEC) on all matters of electrotechnical standardization. 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. International Standard ISO 10349-12 was prepared by Technical Com- mittee ISO/TC 42, Photography. tography Photographic-grade chemicals - Test methods: — Part 1: General Part 2: Determination of matter insoluble in water Part 3: Determination of matter insoluble in ammonium hydroxide solution Part 4: Determination of residue after ignition -- Part 5: Determination of heavy metals and iron content Part 6: Determination of halide content - Part 7: Determination of alkalinity or acidity Part 8: Determination of volatile matter Part 9: Reaction to ammoniacal silver nitrate - Part 10: Determination of sulfide content ISO1992 by any means, electronic or mechanical, including photocopying and microfilm, without per. mission in writing from the publisher. nternational Organization for Standardization Case Postale 56 . CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii ISO10349-12:1992(E) Part 11: Determination of specific gravity Part 12:Determination of density ii