Description

Product Description

Phenol yellow test paper is used to assess the probability of yellowing of textiles during transportation and storage. For white or light coloured yarns, fabrics or finished garments.
This test is only applicable to predict the yellowing caused by the reaction with oxygen or nitrogen, but not applicable to the yellowing caused by other reasons, such as light fading, smoke fading and so on.
Can control the quality of white or light-colored fabrics,
Compliant with standards: EN ISO 105-X18:2007 & M&S C20B
Original packaging: 100mm x 75mm, 50 sheets/pack
Packaging text:
QUALITY ASSURED CONSUMABLES James H.HEAL
DESORIPTON
Impregnated Test papers 100*75mm
TECHNICAL DESCRIPTION
Per Pack(50)
To be used within 3 months of opening.
Complies with EN ISO105-X18:2007
& M&S C20B
STOCK CODE: 706-720
BATCH NUMBER: 3450
UNIT OF MEASURE:PK50
Identify discoloration of fabrics or yarns due to the reaction of nitrogen oxides with yellowish carbolic acid.

test steps
1. Fold the test paper in half along its wide axis, and the folded size is 50 mm × 75 mm, which is consistent with the size of the sample.
2. Put the sample between the test papers, and place the sandwich structure (= material + test paper) between two glass sheets, (only 5 sandwich structures plus one for the control can be tested in this test. textile samples).
3. Wrap the package (= a fixed number of sandwich structures) tightly with a polyethylene plastic film containing 2,6-di-tert-butyl-4-nitrophenol in three layers and seal it with transparent glue.
4. Put the package into the sweat-resistant holder.
5. Place a weight of 45 Newtons (about 4.5 kg) on top of the sweat stand. Tighten the side screws to secure the weight of the weight to the material. Once secured, remove the additional weight
6. Place the sweat-resistant stand in an oven at 50°C ± 2°C for 16 hours.
7. After the required time, remove the package from the oven and cool to room temperature.

Test identification: check whether the control textile sample turns yellow, if it turns yellow, it means the test is successful.