ISO 19076:2023
Leather — Measurement of leather surface — Electronic techniques
This document provides a method for the measurement of the surface of leather or leather parts by the use of electronic measuring machines.
It applies to the measurement of leather (or leather parts) fulfilling the following requirements:
— flexible leather, finished or unfinished dry leather;
— flexible wet leather (see Annex E);
— flexibility, such as to allow full distension on the measuring line or surface.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus and materials
5.1 Measuring machines
5.1.1 General
5.1.2 Measuring machine types with linear sensor array (types A, B and C)
5.1.3 Type A roller measuring machine
5.1.4 Roller measuring machine with transport roller (type A1)
5.1.5 Roller measuring machine with transport conveyor (type A2)
5.1.6 Conveyor measuring machine (type B)
5.1.7 Standard conveyor measuring machine (type B1)
5.1.8 Vacuum tape conveyor measuring machine (type B2)
5.1.9 Flatbed scanning machines (type C)
5.1.10 Camera measuring machine (type D)
5.2 Reference calibrated templates for machine verification
6 Sampling and conditioning
7 General measurement criteria
7.1 General requirement
7.2 Leather orientation during measurement
7.2.1 General
7.2.2 Measuring whole leather pieces
7.2.3 Measuring half-leather pieces
7.2.4 Measuring leather cut pieces
7.3 Measurement operations
7.3.1 Roller machines
7.3.2 Conveyor machines
7.3.3 Flatbed scanner machines and bi-dimensional static measuring devices
8 Measurement procedure
9 Calculation and expression of results
10 Test report
Annex A (normative) Manufacturing characteristics of calibrated templates for the verification of electronic measuring machines
Annex B (normative) Procedure for the verification of a measuring machine by calibrated templates
Annex C (normative) Laboratory record of calibrated templates
Annex D (informative) Repeatability and reproducibility
Annex E (informative) Pickled and wet leather conditioning before testing
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus and materials
5.1 Measuring machines
5.1.1 General
5.1.2 Measuring machine types with linear sensor array (types A, B and C)
5.1.3 Type A roller measuring machine
5.1.4 Roller measuring machine with transport roller (type A1)
5.1.5 Roller measuring machine with transport conveyor (type A2)
5.1.6 Conveyor measuring machine (type B)
5.1.7 Standard conveyor measuring machine (type B1)
5.1.8 Vacuum tape conveyor measuring machine (type B2)
5.1.9 Flatbed scanning machines (type C)
5.1.10 Camera measuring machine (type D)
5.2 Reference calibrated templates for machine verification
6 Sampling and conditioning
7 General measurement criteria
7.1 General requirement
7.2 Leather orientation during measurement
7.2.1 General
7.2.2 Measuring whole leather pieces
7.2.3 Measuring half-leather pieces
7.2.4 Measuring leather cut pieces
7.3 Measurement operations
7.3.1 Roller machines
7.3.2 Conveyor machines
7.3.3 Flatbed scanner machines and bi-dimensional static measuring devices
8 Measurement procedure
9 Calculation and expression of results
10 Test report
Annex A (normative) Manufacturing characteristics of calibrated templates for the verification of electronic measuring machines
Annex B (normative) Procedure for the verification of a measuring machine by calibrated templates
Annex C (normative) Laboratory record of calibrated templates
Annex D (informative) Repeatability and reproducibility
Annex E (informative) Pickled and wet leather conditioning before testing
Bibliography