Whiteboard Marker Refill Ink – Black, Blue, Green, Red (15ml)

Soni OfficeMate Whiteboard Marker Refill Ink – Black, Blue, Green, Red (15ml) | Bright Colour | Eco-friendly 

Technical Specifications & Key Features :

  • Ink Type: High-opacity, pigment-based dry-erase ink.
  • Solvent / Odor / Toxicity: Alcohol-based, low-odour, non-toxic, xylene-free and toluene-free.
  • Drying Time: Less than 5 seconds on the whiteboard.
  • Erase Performance: Smooth dry-erase performance. Wipes off cleanly with no ghosting, even after 21 days.
  • Cap-Off Time: Up to 24 hours without drying out.
  • Color & Visibility: Produces bold, high-visibility black markings with good lightfastness.
  • Refillable & Eco-Friendly: Designed to refill whiteboard markers for longer life and reduced waste.

Physical Properties - Basic Colours (Black, Blue, Red, Green) :

  • Brookfield Viscosity (at 25°C, 60 rpm by 61 LV Spindle) :
    • Black: 12.30 cps | Blue: 13.45 cps | Red: 15.35 cps | Green: 15.20 cps
    • Ensures smooth ink flow and consistent writing performance.
  • Particle Size (µ) :
    • Uniform range of 0.4 – 1.0 µm across all colours for stable dispersion and clear marking.
  • Surface Tension (d/cm) :
    • Black: 24.00 | Blue: 24.00 | Red: 23.00 | Green: 25.00
    • Optimized for controlled ink spread and adhesion on non-porous whiteboard surfaces.
  • Specific Gravity (g/cm³ \) :
    • Consistent value of 0.820 g/cm³ for all shades, providing balanced ink density and refill compatibility.
  • Drying Time on Whiteboard :
    • Less than 5 seconds for all colours, preventing smudging during rapid writing.
  • Erasability (after 21 days) :
    • Excellent – ink wipes cleanly without ghosting or residue even after extended exposure.
  • Cap-Off Performance (24 hrs at 25°C) :
    • Good – marker remains functional after 24 hours without cap, confirming superior open-time stability.
  • Oven Test (50°C for 15 days) :
    • Flow OK for all colours, validating heat resistance and ink durability.
  • Colour Range Stability :
    • Consistent optical density and brightness maintained across all four base colours.
  • Performance Summary :
    • Fast-drying, low-odour, and thermally stable formulation ideal for professional, educational, and industrial applications.

Special Available Colours :

Material Composition (Ink-Compatible Marker Components) :

  • Nib: Polyester (PE) or Acrylic
  • Filter: Polyester with polypropylene wrapping
  • Barrel: Polypropylene (PP)
  • Cap: Polypropylene Co-polymer (PPCO)
  • Nozzle & Plug: Polypropylene (PP)

These components ensure ideal ink flow, compatibility, and durability.

Whiteboard Ink Compatibility :

  • Dry-erase ink (non-permanent)
  • Can be easily erased with a duster or cloth
  • Doesn’t leave ghosting (faint stains or marks)
  • Safe for common whiteboard surface (like melamine, porcelain, glass et

Shelf Life & Storage Instructions :

Shelf Life: 2 years from date of manufacture (unopened).

Storage Conditions:

  • Keep bottle tightly sealed.
  • Store in a cool, dry place (10°C – 30°C).
  • Avoid direct sunlight and heat.
  • Keep away from flames (ink is flammable due to alcohol base).
  • Store upright to prevent leakage.
  • Keep out of reach of children.

FAQs :

Q1. How easy is it to erase the ink?

A. The ink erases cleanly with a whiteboard eraser or dry cloth. No hard scrubbing required.

Q2. Does it leave stains or ghost marks?

A. No. It is formulated to prevent ghosting and leaves the board clean after erasing.

Q3. How long does the ink last inside the marker?

A. When markers are capped properly, the ink can last for months to years. Horizontal storage is recommended.

Q4. How vibrant is the black color?

A. The ink writes in bold, high-contrast black, clearly visible from a distance.

Q5. Does the ink dry quickly?

A. Yes, the ink dries in under 5 seconds, reducing smudging during writing.

Q6. Do I need special cleaning agents?

A. No. Regular erasing tools work daily. For deep cleaning, a whiteboard cleaner or mild rubbing alcohol can be used if needed.