The present disclosure relates to a plastisol based composition for blocking dye migration from a dyed polyester blended cotton fabric or 100% polyester fabric into a print on the fabric, the print being done with a plastisol based color dye on the dyed fabric. The plastisol based composition of the present disclosure comprises an acrylic based resin devoid of vinyl chloride moiety, a plasticizer, an organic wetting agent, a formaldehyde free discharge agent and an extender. A process for printing fabrics using the plastisol based composition of the present disclosure is also disclosed.