Dr. Ph. Martin's Inks & Liquid Watercolours

Dr. Ph. Martin's has been making liquid colour for artists, illustrators, calligraphers and designers since 1934, and the brand is still the standard for vibrant, high-pigment water-based colour. We carry the full UK range in one place.

The collection covers all the main product lines: Bombay India Inks for drawing, calligraphy and airbrush work (lightfast and waterproof once dry), Radiant Concentrated Water Colors for illustration and graphic design where the brightest possible colour matters (dye-based — not lightfast, but unbeaten for vividness), Hydrus Fine Art Watercolors for archival work where lightfastness is the priority, Iridescent Calligraphy Colours for shimmering finishes on dark paper, and Bleedproof White for opaque corrections, highlights and lettering.

If you're new to the range, the rule of thumb is: Radiant for brightness, Hydrus for permanence, Bombay for ink work, Bleedproof for highlights. Buy by the individual bottle or in the boxed sets — the sets are usually the better value if you want to explore the colour range.