Dyes are well-known to be utilised in the textile, printing, food, and cosmetic industries. Since the introduction of synthetic dyes in 1856, these huge families of chemical substances have enriched chemistry. Every year, more than 800,000 tonnes are produced. Dyes are organic molecules that contain chromophore and auxochromic groups and are grouped into numerous groups with varying structures for varied purposes. These applications are dependent on the chemical structure of the dye, its hue, and the complete light absorption system. The chromophores are the groups of atoms responsible for the dye colour, and auxochromes are electron withdrawing or donating substituents that cause or intensify the colour of the chromophores by shifting adsorption towards longer wavelengths and increasing absorption intensity. The adsorption behaviour of a highly luminous laser dye Rhodamine B (RhB) integrated into ultra thin films in a long chain fatty acid matrix of Stearic acid is described in this study.