Dominant Industry Standard 106 Periwinkle Blue – 25ml Fountain Pen Ink

Periwinkle is one of those colour names that means slightly different things to different people — sometimes closer to pale lavender, sometimes closer to a proper mid-blue with just a hint of violet underneath. Dominant Industry's take leans toward the latter: a purple-toned blue with enough saturation to hold its own as a genuine daily-writer, not just a soft accent colour.

Dominant Industry Standard 106 Periwinkle Blue is a 25ml fountain pen ink from the Standard Series, made in small batches at Dominant Industry's studio in Paju, South Korea. Like all Standard Series inks, it's built for everyday fountain pen use — no shimmer particles, no special handling, safe for both fountain pens and dip pens.

Available at Shosai (shosai.ca) in Gatineau / Ottawa — with in-store pickup (J9J 0K6) and Canada-wide shipping.

The Colour

Base Tone

Periwinkle Blue is a purple-toned, medium blue — vibrant and clearly saturated rather than pale or washed out. Colour intensity shifts noticeably depending on nib width and how wet the pen runs; reviewers note the ink varies from a rich, medium-dark blue on white paper to a softer, greyer blue on cream-toned papers. It's a colour that rewards a bit of experimentation across your paper collection.

Shading

Periwinkle Blue's strongest quality is its moderate, genuinely lovely shading — reviewers across multiple independent write-ups single this out as the ink's best feature, with visible pooling and tonal variation in normal handwriting, not just in large swatches.

Shimmer

Periwinkle Blue has no shimmer. It should not be confused with Periwinkle Twinkle, a related shade in Dominant Industry's Pearl Series that carries rose-gold shimmer — this is the Standard Series version, built for uncomplicated daily writing.

Ink Properties at a Glance

Flow & Dry Time

A well-behaved, moderately wet flow suited to fountain pens, calligraphy, and drawing, with dry time landing around 30 seconds depending on paper.

Formula & Safety

A dye-based ink, pH-neutral and safe for resin and celluloid fountain pens, with a good balance of permeability and viscosity that keeps it gentle on nibs.

Paper Performance

Periwinkle Blue performs well across fountain-pen-friendly papers such as Rhodia, Tomoe River, and Clairefontaine, with no significant feathering or bleed-through reported.

Recommended Uses

• Daily journaling and everyday writing — a vibrant blue with genuine tonal interest, well suited to extra-fine through medium nibs
• Letters and correspondence — an expressive but still highly legible colour
• Calligraphy and drawing — reviewers note it works well beyond standard fountain pen writing

About the Standard Series

The Standard Series is Dominant Industry's core lineup of everyday fountain pen inks — no shimmer, no colour-changing effects, just richly developed colour and shading built for daily use. Periwinkle Blue is one of the line's most consistently praised entries for shading alone.

About Dominant Industry

Dominant Industry is a South Korean ink studio based in Paju, dedicated to small-batch production and colours drawn from natural light and landscape. Rather than working from a flat colour chart, the brand develops each ink around a specific visual idea, aiming for what they describe as "bottled light" — colour that can be felt as much as seen.

Product Specifications

Available at Shosai — Ottawa–Gatineau

Shosai (shosai.ca) is a fine stationery boutique serving the Ottawa–Gatineau National Capital Region. We carry a curated selection of premium fountain pen inks, papers, and writing instruments from the world's most respected stationery brands.

• 📍 In-store pickup: Gatineau, QC — J9J 0K6
• 🛵 Local delivery: Available in the Ottawa–Gatineau area
• 🚚 Canada-wide shipping
• 🇨🇦 Bilingual service — English and French

Whether you are new to fountain pens or a seasoned collector, Shosai is your local destination for inks that go beyond the ordinary.