BS ISO 16762:2016 pdf download – Graphic technology — Post- press — General requirements for transfer, handling and storage
4.3 Incoming goods inspection
4.3.1 General All incoming packing units shall be free of damage that affects the quality and/or the processability of the goods. Incoming intermediate products and raw materials may show visual defects and or defects affecting their subsequent processability. They shall therefore be inspected with respect to obvious defects. These include surface modifications (smudging, carboning, scratches, abrasion, set off, etc.), non-flatness (waviness, curling, etc.) and damage (wrinkles, holes, etc.). Prior to processing of such damaged intermediate products, the supplier or the customer shall be informed in order to decide on further steps. This communication shall be undertaken if obvious damage is detected during or after the post-press operation or if there are difficulties encountered with the actual operation. All communication shall be documented in the job information.
4.3.2 Presentation
Raw materials should be presented in a way to avoid unnecessary preparative operations. Materials intended for automated feeding shall all be of the same size and aligned squarely and parallel to each other on the leading edge. Specific requirements for automated feeding should be communicated prior to production.
4.3.3 Package identification
The presentation of raw materials should be clearly identified with the relevant specification and batch numbers on the package label. This should include the quantity or weight information where appropriate. Where products or raw materials have a specific shelf life, the date of manufacture and expiry of the shelf life shall be clearly marked on the packaging. The wrapping shall be free from any significant damage.
4.3.4 Storage and handling Materials that are used in post-press environments shall be appropriately stored to prevent damage and contamination. The materials shall be used within the period of specified shelf life.
4.3.5 Temperature and humidity adaption Raw materials should be left in an environment of similar temperature and humidity to the rest of the production procedure until temperature equilibrium has been reached. Hygroscopic materials like paper shall be temperature equilibrated and climate stable wrappings should only be removed if the relative humidity of the environment is within ±10 % of that of the paper. Deviations from this requirement shall be communicated to the supplier and/or customer. 4.3.6 Size and squareness tolerance (sheets) The materials that are presented in piles of sheets shall be square and of the correct size as marked on the packaging. If any problem reasonably related to dimensional deviations occurs or in case of doubt, the dimensions of a cut pile shall be determined by taking the measurement of a number of samples according to ISO 186. The size and squareness of the sheet shall be determined by measuring the height (H1 and H2) and width (W1 and W2) lines for size and the diagonal lines (X and Y) as shown in Figure 1, where the squareness tolerance is the value of X – Y.
The size and squareness tolerance shall be in accordance with the requirements of the process and/or end-product quality.
4.4 Intermediate product requirements
4.4.1 Presentation
All materials used to produce intermediate products intended to be further processed by post-press operations shall conform to the process requirements of the post-press operations used and conform to the environmental requirements applicable. The ink on all printed matter shall be dried or cured sufficiently to prevent disruption to the product being processed, e.g. marking. Where there is more than one job on the substrate (also variable information and/or versions), clear identification of the job details should be included on the printed piece. The location of this information should be such that, after job separation, this information is easily visible. When it is not possible to put the identification information on the printed product, the job information shall contain identifying information such as a thumbnail image or principal distinguishing characteristic.