1769 NTERNATIONAL STANDARD Tso INTERNATIONAL ORGANiZATION FOR STANDARDIZATION MEKIyHAPOHA OPrAHW3AM IO CTAHIAPTW3AlIWW.ORGANISATION INTERNATIONALE DE NORMALISATION Laboratory glassware -- Pipettes - Colour coding Verrerie de laboratoire - Pipettes -- Code de couleurs First edition - 1975-09-01 SO 1769-1975 (E) UDC 542.3 : 531.731.1 : 621-777 Ref. No. ISO 1769-1975 (E) Descriptors : laboratory glassware, pipettes, colour codes. Price based on 2 pages Copyright International Organization for Standardization ed without license from IHS Not for Resale 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 Bodies for approval before their acceptance as International the Member to Standards by the ISO Council. Prior to 1972, the results of the work of the Technical Committees were published Recommendations; these documents are now in the process of being as Iso transformed into International Standards. As part of this process, Technical Committee ISO/TC 48 has reviewed ISO Recommendation R 1769 and found it technically suitable for transformation. International Standard ISO 1769 therefore Recommendation R 1769 was approved by the Member Bodies of the ISO following countries : India Austria Poland Belgium Iran South Africa, Rep. of Canada Ireland Spain Colombia Israel Thailand Czechoslovakia Italy Turkey Egypt, Arab Rep. of Korea, Dem.P. Rep. of United Kingdom France Netherlands U.S.A. Germany New Zealand Yugoslavia Greece Peru No Member Body expressed disapproval of the Recommendation. No Member Body disapproved the transformation of ISO/R 1769 into an I nternational Standard. @ International Organization for Standardization, 1975 : Printed in Switzerland CopyrationalganzatioSandardizao Not for Resale d without lice nse from IHS ISO 1769-1975 (E) INTERNATIONAL STANDARD Laboratory glassware -- Pipettes -- Colour coding 0 INTRODUCTION 4 COLOURS Variations in the enamels used and in the methods of In order to assist as rapidly as possible in harmonizing the coding systems already in existence and with a view to application appropriate for pipettes made from different avoiding the appearance of other systems in the future, this types of glass inevitably result in minor variations of colour, International Standard is limited essential and it is therefore not appropriate to specify closely the to the requirements. It is intended at a later date to consider the seven colours mentioned in the tabies. standardization of suitable requirements and test methods for the durability of the cotours used for coding. NOTE -- The purpose of this International Standard is to ensure 5 METHOD OF MARKING that if a colour code is used on pipettes, all manufacturers will use the same code; it is not intended as an encouragement of colour The colour code shall take the form of colour bands coding if this is not required. extending at least 150° around the circumference of the pipette and situated not more than 70 mm from the top of 1 SCOPE the pipette and not less than 20 mm above the nearest graduation line. This International Standard specifies a system of colour coding for one-mark pipettes for identification of nominal For a code consisting of a single band of colour, the band shall be 6 to 10 mm wide. For a code consisting of two capacities, and for graduated pipettes for identification of bands of colour, each band shall be 3 to 5 mm wide and the nominal capacities and units of sub-division. two bands shall be separated by a space of 2