Light Fastness Tester

Light fastness tester or color  fastness tester is a laboratory instruments for color blind test technique  to determine the color fastness to light of textiles and garments against sunlight. All dyed material experience change in color when showing to daylight for a adequately long period because of the act of sunlight. The light fastness test is signified by the number of the light fastness standard fabric that change color as the test specimen. It is describe as the numerical score for light fastness.

Features of  Tester for Color Fastness To Light:

Feature of light fastness tester for color blind test is given below with picture

• It is an effective fabric & garment testing equipment using color fastness to light
• Light fastness tester is used to degradation of textiles to Sunlight.
• Clamps of stainless steel is used for laboratory instruments
• The test report of light fastness test is documented with test record
• Light fastness tester is very essential in textile lab

Other Chemical Fastness test:

The following chemical test are carried out by QA of finished fabric –

• Fastness to perspiration
• Fastness to light
• Fastness to heat
• Fastness to sea water
• Fastness to chloraminated water
• Washing stability
• Fabric pH

Fastness to perspiration-:

• Machine used -Perspirometer chemical kit & Carbolite incubator.
• Machine manufactured by      -James . H . Heals and company, England.
• Person responsible-QA lab assistant
• Frequency-Whenever customer required.
• Procedure -BS 1006 ref- E 04, AATCC 105, AATCC 15.
• In case of non conformity -Re-wash and Re-finish with fixing agent.

Light fastness test:

• Machine used -Light fastness tester (Mercury Vapor Lamp).
• Machine manufactured by-James . H . Heals and company, England.
• Person responsible-QA lab assistant
• Frequency-Whenever customer required.
• Procedure -BS 1006  B02.
• Performance standard-For dark shade 4C, for light & Pal shade 3C and according to customer requirement.
• In case of non conformity -Select dye stuff with better light fastness property

Fastness to heat:

• Machine used -Contact heat test unit
• Machine manufactured by      -Roaches Engineer limited
• Person responsible-QA lab assistant
• Frequency-Whenever required.
• Procedure -ISO 105 – Poland BS 1006 – X11.
• Performance standard-According to customer requirement.
• In case of non conformity -Select dyestuff with better fastness to heat

Fastness to sea water:

• Machine used -Perspirometer chemical kit & Carbolite incubator.
• Machine manufactured by      -James . H . Heals and company, England.
• Person responsible-QA lab assistant
• Frequency-Whenever required.
• Procedure -ISO 105 E02 – 1989.
• Performance standard-According to customer requirement.
• In case of non conformity       -For color change 4C and for color staining 4S.

Fastness to Chlorominated water:

• Machine used -Gyro wash
• Machine manufactured by-James . H . Heals and company, England.
• Person responsible-QA lab assistant
• Frequency-Whenever required.
• Procedure -AATC 162
• Performance standard-ccording to customer requirement.
• In case of non conformity -For color change 3C

Fastness to washing stability:

• Machine used -Electrolue Wascator.
• Machine manufactured by-Wascomat.
• Person responsible-QA lab assistant
• Frequency-Every order and batcher.
• Procedure -BS 4923 ref- 2A, AATCC135, ISO 6330.
• In case of non conformity -Re-finish and Re-sanforize.

Fabric pH:

• Machine used -Metller Toled
• Machine manufactured by      -Metller Toledo AG
• Person responsible-QA lab assistant
• Frequency-Whenever required.
• Procedure -AATCC 81 – 1996
• Performance standard-According to customer requirements.
• In case of non conformity -Re-wash or Re finish with acid (in case of reactive dyed fabric)

Water Hardness Test:

• A.100ml water is taken in a Vickers
• B.4ml ammonia buffer solution is taken in it.
• C.2-3 drops black indicator ( Ericromic Black T
• Then have to titrate with 0.01N EDTA.
• Result- = Burette reading × 10, Standard> 60
• If burette reading is more than 6o then it will not be ok.

TEST METHOD

Principle

The UV screening agent is applied in combination with TERASIL dyes by padding, followed by drying and Thermosoling treatments.

The light fastness improvement achieved for a combination of dyes is assessed colorimetrically by standardized HT light exposure tests.

Procedure

Material	10.0 g  Tersuisse polyester tricot,   washed off, heat set at 175°C type 2031 ( No. 5-4204 )
Machinery / apparatus	Benz pad mangle   Mathis stenter
Dyes	Dyes	pale grey	charcoal
	TERASIL Yellow X-GWL	1.30 g/l
	TERASIL Red X-GSA	0.30 g/l
	TERASIL Violet X-B	0.04 g/l
	TERASIL Blue X-BGE	0.30 g/l
	TERASIL Grey X-SGN		50 g/l
Chemicals / auxiliaries	UV screening agent         0, 15, 30, 60 g/l   CIBAFLOW PAD                             1 g/l IRGAPADOL MP                           10 g/l acetic acid 80 % pH 5.5                  x ml/l
Liquor	100 ml per sample, de-ionized water
Padding	Pick-up:                               100 %   Temperature:                       20°C Pressure:                              12.0 kp/cm2 Speed:                                  1.0 m/min Runs:                                    2
Drying	5 min at 120°C, of which 2 min without  and 3 min with air circulation
Thermosoling	90 s at 215°C  for pale – medium shades   90 s at 230°C  für deep shades
Afterclearing	rinse	5′	Cold
	afterclear	5′	70°C	2 g/l hydrosulphite   5 g/l caustic soda 30% 1 g/l ERIOPON OS
	rinse	5′	Warm and cold
	Neutralize	5′	20°C	0.5 ml/l acetic acid 80%
	Rinse	1′	Cold
Light fastness tests	The dyed samples are tested by the well-known automobile industry standard HT light exposure procedures. The choice of test is country-specific, the main ones being:
	SAE J1885 with 488.8 kJ   FAKRA 5x  DIN 75202 JASO BP 83°C 400 h
Assessment	Colorimetric:           colour difference (CIELab)   CFU relative strength (in %) Fastness/change of shade

Specifications of Color Fastness Tester:

Specification of light fastness tester for color blind test is given below –

[label type=”label” title=”Specifications Name“]	[label type=”label” title=”Specifications Value“]
Product Category	Lab
Machine Category	Color Fastness Tester
Product Name	Color Fastness Tester laboratory instruments
Product Model	According to Manufacturer
Product Class	New
Origin	China/India/Others
Brand/Manufacturer	Name of Manufacturer
Agent in Bangladesh	No/Yes
Power	220 Volts, 50 HZ, A.C. Supply
Temperature	20°-24°C
Certification	SGS/Others
Production Capacity	NA
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	50 Nos. ‘C’ Cylindrical Cells
Maximum Space per Type	110 x 50 mm Rectangular Cells
Specimen Thickness	Up to 15 mm
Specimen size	100 x 50 mm
Maximum Number of Specimen	10 Nos.
Life of Lamp	2000 Hours
Power Consumption	Maximum 1 KW.
Water	Use of Water only in the water circulation Unit.
Dimension	700 x 500 x 850 mm
Weight	25 kg
Operating Conditions
Description	To determine the color fastness and aging to sunlight, weather resistance, compound color fastness to sunlight-perspiration of colored textile,  plastic, etc

 [1] Asad Rajon,  B.Sc in Textile Engineering, Dyeing Executive, Envoy Group, Email: eng.rajon2011@gmail.com, Cell# 01911860482