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Objective evaluation of fabric handle - KES second part

Objective evaluation of fabric handle 

The second part of KES was to produce a set of instruments to measure the appropriate fabric properties and then to correlate these measurements with the subjective assessment of the handle. 

The system would enable an operator to measure reproducibly the total hand value of a fabric. 

This system was known as the KESF system.

KESF system consists of four specialized instruments.

FBI Tensile and shearing 

FB2  Bending 

FB3  Compression 

FB4  Surface friction and variation

These instruments are able to measure the tensile, compression, shear, and bending properties of the fabric together with the help of surface roughness and friction. 

A total of 16 parameters are measured, all at low levels of force, which are intended to mimic the actual fabric  The following types of quantities are measured by this system. deformations found in use. 

DSPAT KES- fabric handle
KES- fabric handle

Fabric property




Linearity of load extension curve


Tensile energy


Tensile resilience



Shear rigidity


Hysteresis of shear force at 0.5°


Hysteresis of shear force at 5°



Bending rigidity


Hysteresis of bending moment

Lateral compression


Linearity of compression thickness curve


Compressional energy


Compressional resilience

Surface characteristics


Coefficient of friction


Mean deviation of MIU


Geometrical roughness

Fabric construction


Fabric weight per unit area


Fabric thickness

The tensile properties are measured by plotting the force-extension curve between zero and a maximum force of 500gf/cm (4.9N/cm), the recovery curve as the sample is allowed to return to its original length is also plotted to give the pair of curves.

DSPAT tensile strength
Force VS Extension tensile strength 

From these curves, the values like tensile energy, linearity, and resilience are calculated.

Tensile energy WT = the area under the load strain curve (load increasing) 

Linearity LT = WT / area triangle OAB 

Resilience RT = area under load decreasing curve / WT * 100% 

The compressional properties are measured by placing the sample between two plates and increasing the pressure while continuously monitoring the sample thickness up to a maximum pressure of 50gf/cm (0.49 N/cm ). 

Questions -

  1. What is the objective evaluation of the fabric handle?
  2. Which fabric properties are measured on KES?
  3. Draw a graph between force and extension tensile strength.


Booth, J. E. :. (n.d.). Principles of textile testing an introduction to physical methods of testing textile fibres, yarns, and fabrics. London: National Trade Press Ltd,1961. from

Cenote, M. (2015). Google Books. In The SAGE Guide to Key Issues in Mass Media Ethics and Law (pp. 847–858). SAGE Publications, Inc.

Ferreiro López-Riobóo, J. I. (2015). Long-term (2001–2012) study of a proficiency testing scheme for textiles. Accreditation and Quality Assurance20(4), 239–245.

Further reading 

Part-1 Fabric Objective evaluation methodology - Kawabata system

Part-2 Objective evaluation of fabric handle - KES second part

Part-3 Fabric Objective evaluation methodology - FAST system

Part-4 Fabric Assurance by Simple Testing 1 to 4

Writer - 

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