OSI 5638 NTERNATIONAL STANDARD INTE RNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAH OPrAHW3ALWR IO CTAHAAPTW3ALWWORGANISATION INTE RNATIONALE DE NORMALISATION Solid fibreboard - Determination of grammage of single layers Carton compact -- Détermination du grammage des couches élémentaires First edition -- 1978-10-01 ISO 5638-1978 (E) Ref. No. ISO 5638-1978 (E) UDC 676.266.28 : 676.017.25 Descriptors : paperboards, box boards, physical tests, determination, specific surface. Price based on 2 pages Copyright International Organization for Standardization 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 technicai committees are circulated the member bodies for approval before their acceptance as International to Standards by the ISo Council. International StandardISO 5638 wasdeveloped by /Technical Committee iSO/TC 6, Paper, board and pulps, and was circulated to the member bodies in December 1976. it has been approved by the member bodies of the following countries : Australia France Norway Austria Germany Romania Belgium Hungary South Africa, Rep. of Brazil India Spain Bulgaria Iran Sweden Canada Ireland Switzerland Italy, Turkey Czechoslovakia Egypt, Arab Rep. of Mexico United Kingdom Finland New Zealand U.S.A. No member body expressed disapproval of the document. @ International Organization for Standardization, 1978 : Printed in Switzerland ed without licensefrom IHS Not for Resale ISO 5638-1978 (E) INTERNATIONAL STANDARD Solid fibreboard -- Determination of grammage of single layers 1 SCOPE 4.4 Drying chamber, having natural or forced air circulation for an air temperature of 105 ± 2 °c. This International Standard specifies a method for deter- mining the grammage of single layers of glued and laminated 4.5 Calibration of apparatus solid fibreboard. 4.5.1 Checking of cutting device 2 FIELD OF APPLICATION Measure 20 test pieces and calculate their areas. The cutting accuracy specified in 4.1. is attained when the standard This method is applicable to all types of solid fibreboard deviation of the individual areas is less than 0,5 % of the (as defined in iS0 4046), provided that the adhesive dissolves under the conditions specified for the test. mean area. 4.5.2 Checking of weighing device 3 REFERENCES Check the weighing device frequently by applying accurately IsO 186, Paper and board -- Sampling for testing. measured masses with both increasing and decreasing loads. ISO 187, Paper and board -- Conditioning of test samples. 5 REAGENT isO 4046, Paper, board, pulp and related terms -- Vocabu- Distilled or deionized water, normally at the temperature lary. of the test room. The pH value of the water at the begin- ning of each test shall be 7 ± 1 at a temperature in accord- ance with isO 187. 4 APPARATUS 4.1 Cutting device, capable of repeatedly cutting out 6 SAMPLING test pieces 95 % of which have an area within 1 % of a known area. When this cutting accuracy has been confirmed Select specimens in accordance with ISO 186. (see 4.5.1), use the mean area for calculation of the grammage in subsequent tests on the same type of board Check the accuracy of the cutting device frequently -- and 7 PROCEDURE always when the type of board tested is changed. If the cutting accuracy specified above cannot be achieved (as is 7.1 Conditioning before cutting likely with certain types of board), it is essential that the area of every test piece be determined individually, by Condition the specimens in accordance