The main motive for third-party inks is the significantly larger colour palette, e.g. Private Reserve "Sherwood Green" or special black tones from Noodler. Waterman inks are subjectively regarded as particularly free-flowing, Lamy royal blue as a problem-free, somewhat darker standard blue. Private Reserve inks have the disadvantage of longer drying times and can smear. Pelikan ink is a classic standard, but taste preferences vary widely. Technically these inks can be filled into Montblanc fountain pens without problems.