Widely regarded as the best white ink available for calligraphy, Dr. Ph. Martin's Bleedproof White Ink gives a perfectly opaque finish which is great for writing on dark coloured paper stock. This ink can be used with a dip pen or a brush. It can be used straight out of the jar with a brush but for calligraphy work, it will need a little diluting until you reach your desired consistency. 
 
Please note: this is not waterproof and is not intended for mixing.
Glass bottle
30ml