They’re suitable for dip-pens, fountain pens, technical pens and airbrushes.
The four red-capped bottles are opaque and should be used with a dip-pen or brush.
Winsor & Newton Calligraphy Inks have a permanence rating of AA or A but are not waterproof.
TIPS FOR PREVENTING ‘BLEEDING’ OF CALLIGRAPHY INKS ON PAPER
Bleeding will not occur on good quality watercolour or cartridge paper. If using handmade paper then it is recommended that the paper is sized. It is also possible to use Lifting Preparation, stretching the paper first if necessary.