This Atlas contains Thin Layer Chromatographic (TLC) finger print profile of each of the eighty single Ayurvedic drug included in the first volume of Ayurvedic Pharmacopoeia of India (Part-I). Of the many chromatographic methods presently available, TLC has become widely adopted for the rapid and positive analysis of plant drugs. The special advantages of TLC are its sensitivity, speed and versatility. Sensitivity allows for separation of less than microprogramme amounts of raw material. Versatility allows for a great number of different solvents available in commercial form e.g. silica gel TLC or HPTLC plates, reverse phase plates, cyano-acid diol plates, aluminum oxide and cellulose. TLC provides a chromatographic drug finger print. It is, therefore, suitable for monitoring the identity and purity of dugs, and for detecting adulteration and substitution.