Inkjet printing on dyed synthetic fabrics

A process for digital inkjet printing color images directly on a dyed substrate, the process comprising:

• digitally printing by an inkjet printhead directly on at least a portion of the substrate an immobilizing composition that comprises an acid and an aqueous carrier, and formulated to exhibit an acidic pH lower than 7;
• digitally printing by an inkjet printhead directly on said portion of the substrate an ink composition that comprises a dispersed pigment, a low-temperature curing self-crosslinking resin and an aqueous carrier, and formulated to exhibit an alkaline pH higher than 7;
• and
• curing the printed substrate to thereby initiate a crosslinking reaction and form the image in the form of a film on the surface of the substrate, wherein:
• the dyed substrate is a fabric made of synthetic fibers;
• the dyed substrate is dyed with a dye that migrate at a temperature higher than 120° C.;
• said low-temperature curing self-crosslinking resin is a pH-sensitive low-temperature curing self-crosslinking resin;
• said low-temperature curing self-crosslinking resin initiates crosslinking reaction at a temperature that ranges from 90° C. to 110° C.;
• said low-temperature curing self-crosslinking resin is a polycarbodiimides;
• and
• said curing is effected by heating the printed substrate at a temperature lower than 110±5° C. for 10-12 minutes followed by 3 days at room temperature.