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Understanding Leather


Bridge of Weir, Specifications, leather sample being tested, finished leather and car seat detail

Bridge of Weir, Specifications, brown and grey leather swatches

Bridge of Weir, Specifications, red leather swatches

> Specifications for the Caledonian & Grampian Ranges


Characteristics		      
Minimum Performance Standards 		    
Test Method 
658)_10
         
Colour fastness to rubbing  

Staining and colour change:
Dry              1000 cycles, Min 4 grey scale
Wet             500 cycles, Min 3 grey scale 
Perspiration  100 cycles, Min 4 grey scale

       

EN ISO 11640/ISO 11641
Perspiration solution as
defined in ISO 11641
Colour fastness to light   Min 6 blue scale   ISO 105-B06/ cond.3
         
Cold crack resistance to finish   < -30°C (no finish cracks)   EN ISO 17233:2002
         
Finish adhesion   Min 5 N/10mm
Min 2 N/10mm		   ISO 11644 Dry adhesion
                Wet adhesion
         
Burning  behaviour   Max 75mm/min ISO 3795
         
Flexing endurance   100,000 cycles (no finish cracks)   EN ISO 5402:2002 
         
Tear strength Tear strength

 

 Min 35N
Min 25N		   Method 6 of BS 3144: 1968
EN ISO 3377-1:2002
         
Fogging Min 90%    STD 1027.21711-3
         
Resistance to blocking   Specimens shall separate without lifting the
weight and there shall be no visible damage
to the surfaces.


 

 BS 3434: Part 11
Tension strength & elongation   Min 12 N/mm²
Between 35% to 60%
   ISO 3376
         
Colour fastness to water spotting   Not worse than slight damage
   EN ISO 15700
         
Abrasion   2000 cycles/CS 10/500gr
No rupture of the leather finish
   ISO 5470
         
Heat shrinkage   Max area change 5% @ 168h ± 0.5 at 93°C ± 2°C  
 EN ISO 17227
         
Migration staining   Min 4 grey scale   EN ISO 3377-1