Entre temps j'ai trouvé la réponse suivante dans le manuel de l'imprimante : "For regular usage, this product is not designed to print using only one cartridge. However, when one cartridge runs out of ink, you can remove it and use the other cartridge to continue printing. The printer supports this capability only if the cartridge has sufficient ink. Therefore, you should replace the
empty cartridge as soon as possible."

No. Colour printers require all cartridges to be full enough to work. If one or more are empty then the printer may refuse to print.