ISO 15319 pdf download

ISO 15319 pdf download.Recycled pulps — Estimation of visible contraries by instrumental means using reflected light 1 Scope This International Standard specifies a method for the estimation of visible contraries in pulp by instrumental means using reflected light. This International Standard cannot be used for inspection of pulps of low brightness, i.e. for evaluation of light contraries in dark pulp. Spots which look brighter than the surrounding area due to fluorescence will not be detected by the method described in this International Standard. NOTE 1 The evaluation of contraries smaller than 0,04 mm 2 is not covered by this International Standard. See informative annex A. NOTE 2 This International Standard is mainly intended for the assessment of product quality. Modifications may be needed if it is applied to process control. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 638, Pulps — Determination of dry matter content. ISO 41 1 9, Pulps — Determination of stock concentration. ISO 5263, Pulps — Laboratory wet disintegration. ISO 5269-1 , Pulps — Preparation of laboratory sheets for physical testing — Part 1 : Conventional sheet-former method. ISO 5269-2, Pulps — Preparation of laboratory sheets for physical testing — Part 2: Rapid-Köthen method. ISO 721 3, Pulps — Sampling for testing. 3 Term and definition For the purposes of this International Standard, the following term and definition applies. 3.1 contrary speck any unwanted particle, embedded in the surface of the sheet, including dirt and shives, of specified minimum size and having a markedly contrasting light reflectance with respect to the surrounding area of the sheet, according to the comparison chart in annex B 4 Principle Laboratory sheets are inspected in reflected light by instrumental means. The areas of all contraries larger than a specified value and having markedly contrasting light reflectance with respect to the surrounding sheet are recorded. The areas are added and the total area of the contraries is reported as...