ISO 19594:2017 pdf download

ISO 19594:2017 pdf download.Graphic technology — Test method for the determination of the binding strength for perfect-bound products
1 Scope
This document specifies a test method for the determination of the binding strength of perfect-bound products by pulling out single sheets from the book block in an upward direction.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 186, Paper and board — Sampling to determine average quality
ISO 187, Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1 binding strength
quality measure of the binding quality of a perfect-bound product
Note 1 to entry: Ratio between the pull-out force of a single sheet and the spine length.
3.2 book block
part of a case-bound book or brochure, consisting of a trimmed or untrimmed bound block of sheets,prior to the application of the book case or cover
3.3 glue penetration
uncontrolled and inhomogeneous penetration (several millimetres) of glue between the sheets of a book block (3.2)
3.4 special sheet
sheet of the book block with potentially different properties from those of the majority of the sheets of that book block (3.2)
4 Principle
The binding strength is evaluated by pulling out a single sheet from the book block using a material testing system and a specified test fixture. The test is performed in such a way that the test sheet is clamped on the complete fore edge while the opened book block is fixed at the specimen holder with a specified preload. The test sheet is pulled out upwards by a force acting perpendicular to the binding edge. The maximum force resulting from the pull-out procedure is measured. The binding strength of the specimen is calculated by dividing the maximum force by the spine length of the book block.
5 Apparatus
5.1 Material testing system
The material testing system shall be constructed as a twin-column device that shall be able to perform tensile testing and to apply a preload. It contains an upper moveable traverse, where the force transducer is located. The horizontal working space of the material testing system is determined by the maximum spine length of the products tested. A scheme of the material testing system, including the test fixture (see 5.2), is shown in Figure 1.