ISO 2419:2012 pdf download – Leather – Physical and mechanical tests – Sample preparation and conditioning
1 Scope
This International Standard specifies the preparation of leather for physical and mechanical testing together with standard atmospheres for conditioning and testing. It is applicable to all types of dry leather.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1 atmosphere
ambient conditions defined by the parameters temperature and relative humidity
2.2 standard atmosphere
atmosphere maintained within prescribed tolerances, in which a sample is kept for a given period of time before being subjected to testing
2.3 conditioning
operation designed to bring a sample into a specified condition in relation to temperature and relative humidity by keeping it for a given period of time in the standard atmosphere with free access of moving air to all surfaces
3 Standard atmospheres
3.1 Reference standard atmosphere
The reference standard atmosphere shall have a temperature of 23,0 °C and a relative humidity of 50,0 %.
3.2 Alternative standard atmospheres
3.2.1 General
Alternative, but not equivalent, atmospheres may be used only if the parties involved agree on their use. In case of dispute, the reference standard atmosphere shall be used.
3.2.2 Specific standard atmosphere
The alternative specific standard atmosphere shall have a temperature of 20,0 °C and a relative humidity of 65,0 %.
3.2.3 Tropical standard atmosphere
The alternative tropical standard atmosphere shall have a temperature of 27,0 °C and a relative humidity of 65,0 %.
4 Design of press knives
The design of press knives is shown in Figure 1. The internal surfaces shall be perpendicular to the plane which contains the cutting edge. The angle formed between the internal and external surfaces of the press knife at the cutting edge shall be approximately 20°, and the wedge of this angle shall be of a depth (d)
exceeding the thickness of the leather.
NOTE Hardened, knife-grade steel is suitable for press knives.