1. Which Scale is suitable for determining te color tastness to light?

[Senior Officer (Textile Eng.) 2020 [MCQ] : 2020]

1. 1-5 grading with grey scale

1

2. 1-8 grading with grey scale

2

3. 1-5 grading with blue scale

3

4. 1-8 grading with blue scale

4
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