Process for dyeing a hydrolysis resistant polyester film

A process for dyeing of a hydrolysis resistant polyester film, said process comprising the following steps:

• a. dyeing a hydrolysis resistant polyester film in a dye bath comprising at least one coloring agent (dye), at least one polyhydric alcohol and optionally at least one UV stabilizer, at a temperature in the range of 140° C. to 190° C. to obtain a dyed film;
• b. quenching said dyed film in a first fluid medium to obtain a quenched film;
• c. cleaning said quenched film with a second fluid medium followed by scrubbing and rinsing to obtain a cleaned film;
• and
• d. drying said cleaned film in an oven at a temperature in the range of 50° C. to 250° C. to obtain the dyed hydrolysis resistant polyester film.