“Pigment manufacturers assume the source light will be white’ or of roughly equal intensity across the spectrum. If the light is not a pure white source (as in the case of nearly all forms of artificial lighting); the resulting spectrum will appear a slightly different color. Red paint, viewed under blue light, may appear black. Red paint is red because it reflects only the red components of the spectrum. Blue light, containing none of these, will create no reflection from red paint, creating the appearance of black.” Ref: (http://en.wikipedia.org/wiki/Color Feb. 20th 2012)

Therefore, the source of light and the color of reflected surface are correlated in term of its appearance.

Plate13. A. Tintoretto, Miracle of the Slave (c.1548)
	13 B. Titian 1518 whose dynamic three-tier composition and color scheme Carmine Red Lake pigment, derived from the established him as the preeminent painter north of Rome.

(Source: http://en.wikipedia.org/wiki/Tintoretto ; and
http://www.google.co.in/search?hl=en&q=titian%20paintings%20venice&bav=on.2,or.r_gc.r_pw.,cf.osb&biw=1280&bih=585&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=iOW5T6z3Ocm3rAfOtLWGCA  ; Dated May 21, 2012)
The above paintings (Plates13A&B) are the typical examples of application of pigments. Traditionally colors are extracted from natural minerals (Ocher- earth colors) and organic substance. Flowers and fruits are commonly used for the extraction of indigenous color. Traditionally artist had to depend on natural colors that are available locally. It is found that the natural colors remain luminous much longer while the modern chemical pigments get discolored or faded much earlier.

Plate14. A. Lascaux, France (35000 BC)*1		14. B. Bhimbetka, India (30,000BC)*2

(Source: 14.A. http://www.google.co.in/#hl=en&site=&source=hp&q=cave+paintings+in+france&oq=cave+paintings+in+france&aq=
f&aqi=g5g-K5&aql=&gs_l=hp.3..0l5j0i30l5.2073.12103.0.13022.21.15.3.3.3.0.704.3987.1j4j7j1j1j0j1.15.0...0.0.p560BWlgAzs&bav=
on.2,or.r_gc.r_pw.,cf.osb&fp=1&biw=1278&bih=578 ; May 21, 2012
14. B. http://en.wikipedia.org/wiki/Bhimbetka_rock_shelters ; May 21, 2012
The above Cave Paintings (Plates14A&B) are examples of application of color pigments from the earliest human habitats. Earth-colors (ochers) are applied on the rock surface that remained with the same luminosity even after thousands of years. Due to the local availability the choice of colors (ochers of yellow-red) remained limited. However, the limitation of color did not restrict human beings to create and communicate. Color is utilized to communicate human feeling and their aspirations. Before the development of linguistic expression color could help human being to communicate their feeling and convey message.

Plate15.A. Buddhist Goddess, Pancharaksha, c 1040 AD Pala Dynasty Illustrated Manuscript	15.B. Ajanta (Cave no. 17) Fresco Secco, India 4th-5th C AD (Fresco Secco- Dry plaster fresco)

Source: 15.A http://www.banglapedia.org/httpdocs/HT/P_0039.HTM ; May 21, 2012
15.B. http://www.google.co.in/#hl=en&q=ajanta+cave+paintings+in+india&oq=Ajanta+cave+paintings+in+India&aq=0K&aqi=g-K1&aql=&gs_l=serp.1.0.0i30.11690.15425.0.17533.7.7.0.0.0.0.719.1778.1j2j3j6-1.7.0...0.0.1nec0ZCgsE4&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=559ed03a9971b3dd&biw=1278&bih=578 ; May 21, 2012