 Calcium borate particles synthesized by coprecipitation method were applied on cotton fabric to enhance its flame-retardant property, and their efficacy was analyzed through various tests such as vertical flame test, limiting oxygen index, LOI, comb calorimetry parameters, particle add-on percent, and thermogravimetric analysis. The optimized concentration of calcium borate particles treated cotton substrate showed a significant decrease in peak heat release rate and an increase in LOI value compared to the control cotton fabric. This article was authored by Yiptisha Rajput, Veeran Dasama, Santanu Basik, and others.