Question 62 (Textile Engineering & Fibre Science)
An optical brightener is
| (A) | A synthetic bluing agent |
| (B) | A colourless dye |
| (C) | A flourescent compound |
| (D) | An optical whitener |
An optical brightener is
| (A) | A synthetic bluing agent |
| (B) | A colourless dye |
| (C) | A flourescent compound |
| (D) | An optical whitener |