Deli S521 Liquid Whiteboard Markers 10-Pack

Deli S521 Direct Liquid Ink Whiteboard Markers (10-Pack)

Never run dry during critical presentations or high-intensity classroom lectures with the Deli S521 Direct Liquid Ink Whiteboard Markers 10-Pack. Engineered with an advanced free-flowing liquid ink chamber and a multi-finned capillary feed regulator, the S521 holds up to three times more usable ink than conventional fiber-core markers. Paired with a precise 1.3mm fine bullet nib, this pen delivers intensely saturated, skip-free handwriting that maintains constant color brilliance until the reservoir is completely empty.

Key Features

• 3X High-Capacity Liquid Ink System: Free-ink reservoir holds triple the ink volume of standard cotton-core markers, ensuring extended writing longevity and zero ink waste.
• Consistent Capillary Flow Regulator: Multi-channel feeder prevents nib starvation or dripping, producing flawless continuous lines under rapid writing.
• Precision 1.3mm Fine Bullet Nib: Durable fine tip produces sharp, legible text inside cramped calendar grids, kanban sprint boards, and mathematical formulas.
• Clean Ghost-Free Erasability: Micro-pigment formula releases instantly from non-porous surfaces with a dry swipe, leaving boards immaculate and shadow-free.
• Low-Odor & Non-Toxic Formulation: Xylene-free alcohol vehicle conforms to ASTM D-4236 standards, ensuring comfort in tight huddle spaces and study rooms.
• Solid 10-Pack Single-Color Boxes: Convenient 10-marker packs available in vibrant Black, Blue, or Red to meet high-volume office and school supply needs.

Product Specifications

• Brand: Deli
• Model: S521 (DL-S521)
• Nib Type: 1.3mm Fine Bullet Tip
• Ink Mechanism: Direct Free-Liquid Ink with Capillary Feed Regulator
• Ink Chemistry: Low-Odor Alcohol-Based Dry Erase Ink
• Available Color Variants: Black, Blue, Red
• Pack Size: 10 Markers per Box
• Compatible Substrates: Whiteboards, Glass Memo Boards, Porcelain Panels, Melamine Surfaces
• Safety Standards: ASTM D-4236 Compliant, Non-Toxic
• Country of Origin: China

Usage & Storage Guidelines

1. Write across dry whiteboard or glass surfaces using light to medium hand pressure.
2. Allow lines to set for a few seconds before wiping clean with a dry whiteboard eraser or microfiber towel.
3. Snap caps tightly shut after every use and store markers horizontally to maintain optimal ink balance in the capillary feed.

Frequently Asked Questions

• How does direct liquid ink compare to traditional whiteboard markers?
  Traditional markers use an internal polyester sponge that retains up to 30% of its ink when thrown away. The S521 uses a free-liquid ink tank that empties completely while maintaining full, dark color saturation down to the last drop.
• Is the 1.3mm tip suitable for small desktop memo boards?
  Yes. The 1.3mm fine bullet nib is specifically scaled for compact whiteboards, refrigerator calendars, and detailed process flowcharts where broad chisel markers crowd the space.
• Does the ink leave stains if left on the whiteboard over the weekend?
  No. The specialized release agent prevents pigments from bonding permanently to the board substrate, allowing easy dry erasure even after extended periods.

Customer Support & Pre-Shipment Inquiries:
For questions regarding your order, shipping updates, or delivery adjustments before dispatch, contact our dedicated support team at szjyf@outlook.com. Orders can be canceled for a 100% full refund at any time prior to shipping confirmation.