Define color, Visible color, Wave length, Hue, Value, Chrome, Light and light source which are widely used in textile sector.

Experiment No: 01

Experiment Name: Define color, Visible color, Wave length, Hue, Value, Chrome, Light and light source which are widely used in textile sector.

Color: 

Color derives from the spectrum of light interacting in the eye with the spectral sensitive’s of the light spectors.

Light: 

It is the aspect of radiant energy of which human observer is aware, through visual sensations arising from stimulation of the retina by the radiant energy.

There are several light source widely used in textile sector. 

These are:

D₆₅ (Day light and mostly used).

 T_L85 (Tungsten light),

 D₅₀, Uv, F (Fluorescent light).

Visible color wavelength:

The human visual system samples the visible spectrum range 400 – 700 nm.

The spectors have peak sensitivities to short (~440 nm), medium (~535 nm), wavelength and are S, M & L cones.

Wavelength absorbed (nm)	Color absorbed	Color observed
400 – 435	Violet	Yellow-Green
435 – 480	Blue	Yellow
480 – 490	Green-Blue	Orange
490 – 500	Blue-Green	Red
500 – 560	Green	Purple
560 – 580	Yellow-Green	Violet
580 – 595	Yellow	Blue
595 – 605	Orange	Green-Blue
605 – 700	Red	Blue-Green

Hue: 

How we prescribe an object color. It is the common name of color.

Value (Lightness): 

Value is the amount of black mixed with the hue. It is the color luminous intensity, the degree of lightness color can be classified as light or dark.

Chroma:

 Which is the measure of the saturation of color is expressed by the distance from the value axis. The dullness of color described is chroma.