Light Fastness Tester

Light Fastness Tester

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Light Fastness Tester


Light Fastness Tester is used to determine the color fastness of textiles against sunlight. B-Tex Engineering manufactured instrument produces accurate results as it is of most reliable quality and as per the required standards.

All dyed material experience change in color when exposed to daylight for a sufficiently long period because of the action of sunlight. The color fastness is denoted by the number of the light fastness standard fabric that has change color to the same extent as the test specimen. It is expressed as the numerical rating for light fastness.

Features of Light Fastness Tester:

  • An effective and essential fabric & garment testing equipment.
  • It is used to determine the color fastness and degradation of textiles to Sunlight.
  • This standard model comes with a 500 watt MBTL lamp.
  • Automatic voltage stabilizer.
  • Stainless steel clamps.
  • Gray scale for assessing change in color & L-4 standard @ extra cost.

Specifications of Light Fastness Tester:

Light Source : 500W, MBTL Fading Lamp
Test Chamber Temperature : Ambient to 50° C
Temperature Range Control : By Water Circulation in Type ‘A’ rectangular cells.
Maximum Number of Type : 12 Nos. ‘A’ Rectangular Cells
Maximum Number of Type : 40 Nos. ‘C’ Cylindrical Cells
Maximum Space per Type : 110 x 50 mm ‘A’ Rectangular Cells
Specimen Thickness : Up to 15 mm
Specimen size : 100 x 50 mm
Maximum Number of Specimen :10 Nos.
Working Life of Lamp : 2000 Hours
Power : 220 Volts, single Phase, 50 HZ, A.C. Supply.
Power Consumption : Maximum 1 KW.
Water : Use of Distilled Water only in the water circulation Unit.
Dimension of the Unit : 700 mm(W) x 500 mm(D) x 850 mm(H)
Net Weight : 25 kg.
Recommended Ambient : 20°-24°C Temperature
Operating Conditions : 50%-65% Relative Humidity
Humidity Control

: Inserting Saturated Solution in the type ‘A’ & ’C’ Cells.
Technical specifications & appearance of machines are subject to change without any notice.

Light Fastness Tester confirms with the following international standards:
BS 1006 UK-TN, IS 2454-1985

How Light Fastness Tester Works?

Stage: 1

  • A strip of test specimen (50 × 10 mm) and one strip each of 1 to 8 light fastness standard (LFS) is mounted on the specimen card and the same type is put in the type ?A' rectangular cell. Along with double slot mask (1/3 area cover) 2/3 of the specimen is exposed to light.
  • The effect of light is followed by inspecting the specimen frequently. When a change in color of the exposed portion of the specimen can just be perceived, equal to gray scale grade 4-5, the number of the light fastness standard showing a similar change is noted.
  • The exposure of the specimen and the LFS is continued until the contrast between the exposed and the unexposed portions of the specimen or the LFS no. 7 is equal to gray scale grade 4.
  • If the LFS no.7 fades to a contrast equal to gray scale grade 4 before the specimen does, the exposure is terminated at this stage.

Stage 2:

  • If the specimen fades to a contrast equal to gray scale grade 4 before the LFS no.7  does, the double slot mask is taken out and the single slot mask is inserted having 2/3 area cover.
  • The exposure is continued until the contrast between the fully exposed and the unexposed portions of the specimen is equal to gray scale grade 3. The exposure is terminated at this stage.
  • Assessment of light fastness is done.

Light Fastness Tester confirms with international standards and comes under warranty. All this help provide customer satisfaction that promotes long term customer relationship which is our ultimate objective at B-Tex Engineering. 

Minimum 10 years part availability assurance from the date of Invoice.

Dispatch Time : Appx. 1 Days.

Rs.90000.00Get Quote or Buy
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