Perspirometer/Perspiration Fastness Tester | Working Principle of Perspirometer

Perspirometer
In order to determine the color fastness of dyed or printed fabrics against perspiration, Perspirometer is used. the fabric sample is exposed to the action of both alkaline and acidic reagents while in contact with undyed adjacent fabrics is placed between plastic plates under a fixed load inside an oven maintained at 370 centigrade. All the components of the Perspirometer are manufactured quality stainless steel and are finished in black stoving enamel paint to give them a corrosion resistant finish. 

Perspirometer
Features of Perspirometer:
  1. Can also be used for testing color fastness against sea water and water.
  2. Made of stainless steel frame.
  3. A different load for AATCC standards is available on request.
  4. User friendly and corrosion resistant.
  5. Smooth precision engineered components for excellent performance.
Specifications of Perspirometer:
  • Frame Construction : Stainless steel
  • Load on the Test Specimen : 5 kg.
  • Size of Test Specimen : 100 mm x 40 mm
  • Size of Acrylic Separator Plates : 115 mm x 60 mm
  • Number of Separator Plates : 21 Nos.
  • Dimensions of the Unit : 225 mm (L) x 72 mm(W) x 182 mm(H)
  • Net weight of the Unit : 8.3kg
Working Principle of Perspirometer :
  1. The perspirometer consists of a number of acrylic plates and which can be kept in suitable loading frame.

  2. The loading frame consists of two steel plates between which the acrylic plates placed.

  3. The test specimen are stitched between suitable white cloth pieces and dipped in either alkaline or acidic test solutions.

  4. The composite sample is placed in between any two acrylic plates.

  5. A number of test specimens can be loaded simultaneously between different sets of acrylic plates by stacking them one above the other.

  6. Loading is done by keeping a standard dead weight on top of the upper plate assembly, which consists of two parallel plates separated by suitable compensating springs.

  7. The guide rod attached to top plate of this assembly is locked while under load and the load removed.

  8. The springs compensate for subsequent variations in load due to variation in thickness of the test specimens on drying The test is continued for the required time under the specified condition of temperature.

  9. After this the samples are removed from the frame and dried.

  10. The degree of staining of the while pieces of cloths and change in color of the test specimens are evaluated using grey scales and compared against standard rating cards.

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