The thermochromic pigments have been utilized in a variety of applications, including fashion design, textiles, gloves, military uses, and camouflage. While most of the research has focused on enhancing fastness proprieties, little attention has been given to optimizing the formulation of these pigments. This study aims to improve the fastness properties of thermochromic printed fabrics while optimizing the recipe by reducing the quantity of chemicals used. In this research, 100% cotton fabrics were printed with CHAMELEON thermochromic pigment, utilizing different quantities of fixer and slurry, including samples printed with and without these additives at a 3% shade concentration. Total number of three samples were printed using slurry and three without it. The printed fabrics were then dried at 100ºC and cured at 160ºC. Fastness tests were conducted following international standard methods, including rubbing fastness using a crock meter, lightfastness with a mercury lamp, and washing fastness using a Wascator. Results were visually assessed due to temperature deviations affecting spectrophotometer readings. The findings indicate that while the fastness properties of printed fabrics without slurry or fixer improved, as increase in fixer quantity resulted in decreased fastness properties. By optimizing the quantities of fixer and slurry, better fastness results were achieved for thermochromic printed fabrics without the use of slurry and fixer, instead utilizing a binder.