Esterbrook Ink bottle 50ML Cobalt Blue

Esterbrook Cobalt Blue Ink – 50 ml Bottle

Blue is the colour of writing, and Esterbrook Cobalt Blue takes it to its most elegant expression. This deep, rich blue fountain pen ink is perfect for notes, letters, signatures and journaling, and it looks both professional and full of character. It belongs to the ink collection launched by Esterbrook in 2021, a brand that has been an American writing icon since 1858. The inks are made in Europe and tested for quality and flow.

Key features

• Deep cobalt blue: classic and elegant, ideal for everyday, study and professional writing.
• Excellent readability: a strong colour that stands out clearly on the page.
• Smooth ink flow: tested for quality and flow for a consistent writing experience.
• Easy to clean: rinses out of your pen with plain water.
• Safe for all fountain pens: suitable for modern and vintage pens.
• 50 ml glass bottle: oval shape with a wide mouth that makes filling from the bottle easy.
• Iconic packaging: presented in the traditional Esterbrook red and cream box, a lovely detail for gifting.

The perfect match for your Esterbrook pen

Cobalt Blue is a natural partner for Esterbrook Estie and JR fountain pens, and for any pen that fills with a converter or piston. If you are looking for one blue that works for everything, from the office to your personal journal, this is it.

Technical specifications

Tips for use

• Flush your pen with water before switching to a new ink.
• Close the bottle tightly after use and store it away from direct sunlight.
• Clean your pen regularly for a consistently smooth flow.

Esterbrook Cobalt Blue: the timeless blue for every word you write.