UV spectrophotometer with Color lab software

Color measurements are a method of expressing the -----sensed by humans as values

• wavelength

• colors

• smell

• temperature

1) An example of natural dye

• (a) Turmeric

• (b) Reactive red

• (c) Methyl orange

• (d) Congo red

2) Substance that helps in fixing dye molecule with the textile fiber is called as

• (a)Oxidising agent

• (b)Mordant

• (c)Reducing agent

• (d)Exhausting agent

3) The following are used to describe a colour Except

• (a)Hue

• (b)Chroma

• (c)Lightness

• (d)Colour strength

4) A natural dye that is used in denim fabric is

• (a)Henna

• (b)Indigo

• (c)Turmeric

• (d)Madder

5) An important parameter to assess the depth of the colour in dyed fabrics is

• (a)Colour strength

• (b)Shade

• (c)Colour difference

• (d)Colour constancy

6) When two colours match under one set of illumination, but fail to match under a second set of condition is called as

• (a) Metamerism

• (b) Colour correction

• (c) Colour difference

• (d) Colour strength

7) A perfectly white material will have a whiteness index value of

• (a)25

• (b)50

• (c)75

• (d)100

8) The whiter the substance, the yellow index will be

• (a)Higher

• (b)Lower

• (c)Equal

• (d)Moderate

9) The instrument that measures the colour strengh of dyestuff is

• (a)pH meter

• (b)Textile strength tester

• (c) Spectrophotometer

• (d)Turbiditymeter