Sailor Studio Ink Bottle (770 Yellow - 20ML) 13-1210-770

Sailor Studio Ink Bottle (770 Yellow - 20ML) 13-1210-770

The Sailor Ink Studio 770 is the “true yellow” entry in Sailor’s Ink Studio line — the first in the series to deliver a bright, sunny yellow tone that stands out among more muted inks.  This bottle contains 20?mL of water?based dye ink, packaged in a square glass container and accompanied by converter labels to help users mark which ink is loaded in a pen.  Sailor’s official line description confirms that all Ink Studio inks are dye?based and come in a 20?mL format (W?34 × D?34 × H?58?mm) with weight ~94?g and standard packaging. 

Color & Visual Character

• Hue / Description
  770 is described as a “sunshine yellow” or “bright, cheerful yellow.”  The review at Fountain Pen Pharmacist calls it an “egg?yolk yellow,” noting that in typical writing it can blend into white paper, making it more suited to highlighting or artistic accents. 

• Shading, Sheen & Variation
  The reviews and swatch comparisons suggest low shading (i.e. little tonal variation) and low sheen for 770.  In the Mountain of Ink Set 17 review (which includes 770), the author notes that 770 (along with its set mates) exhibits medium shading and low sheen, and shows well on fountain?pen friendly papers. 

• Legibility & Use
  Because 770 is a bright, light yellow, the Fountain Pen Pharmacist reviewer observed that in everyday writing it “blends in with the paper” and thus is harder to read unless used with heavier or darker outlines.  In that review, the ink is praised for smooth flow but criticized for being too light for general text.  Some users online consider 770 among the more legible yellow inks in the Sailor line, though yellow as a color always pushes the limits of visibility on white paper. 

Performance & Behavior

• Flow & Smoothness
  The ink is reported to have a pleasant and smooth flow.  Even though its light color limits its utility for standard writing, it behaves predictably as a dye ink. 

• Drying Time
  In Mountain of Ink’s test, 770 dried in about 20–30 seconds on high-quality fountain?pen friendly papers, in line with other inks in its set.  The Fountain Pen Pharmacist review also describes the dry time as moderate, not extremely fast. 

• Feathering, Bleed, Show?through
  On good paper (e.g. Tomoe River, Rhodia), feathering is minimal and bleeding is rare.  But on standard or cheap copy paper, heavier nibs produce visible feathering and bleed.  Show-through tends to be moderate. 

• Water Resistance & Stability
  Like most dye inks, 770 is not water resistant — exposure to moisture will likely cause smearing or partial washout. 

• Pen Safety & Cleanability
  Because it’s non?pigmented and a standard dye formulation, 770 is relatively easy to flush from pens and safe for regular use, assuming routine maintenance. 

Use Cases & Practical Advice

• Highlighting / Underlining / Artistic Accents
  Due to its bright yellow hue and limited legibility in regular text, 770 works excellently as a highlighting / accent ink — e.g., underlining, decorative borders, sketches, or layering with darker inks. The reviewer even suggests this in their write-up. 

• Best Paired with Dark Nibs / Broad Outlines
  For better readability, consider pairing 770 with a darker outline ink (e.g. a dark blue or black wash) or use pens with broader nibs that deposit more ink, thereby increasing contrast.

• Paper Matters
  To maximize what little shade or presence 770 has, use fountain?pen friendly, low?absorbency paper (e.g. Tomoe River, Rhodia). On everyday or absorbent paper, yellow inks tend to vanish. 

• Ink Rotation & Labeling
  The 20?mL bottle size is ideal for ink rotators or people trying multiple colors. The included converter labels help avoid confusing inks across pens.