Consumer Goods – writing Instruments

Permanent Marker Nibs and Reservoirs

The Ultimate Ink Flow Management Engine for Your Permanent Markers

Permanent Markers with Maximum Ink Utilization & Leak Protection

Porex has the expertise and experience in ink flow management to optimize your permanent marker’s performance. Our nibs are designed with perfect porosity and capillarity for the smoothest user experience and are compatible with many inks, including high solids/highly pigmented ink. When paired with our reservoirs, which are designed with optimal fiber, density, and wraps, you can create the ultimate ink flow management engine, which can be tailored to the capillarity or dimensional requirements needed for your permanent marker. 

Porex offers two distinct reservoir technologies depending on the specific design needs of your permanent marker writing instrument:

  • POREX® High Efficiency Reservoirs reduce ink waste, and improve end-of-life indication while enhancing performance, which is ideal for high-cost inks.
  • POREX® XPE® Reservoirs are formed from a controlled density of fibers in an extruded seal, allowing you to contain and deliver the maximum amount of ink to your permanent markers.

Porex’s polyester fiber nibs use a combination of fiber and bonding resin, optimized for high ink flow and shaped to your permanent marker’s custom specifications.

Watch how porous nibs and reservoirs work together to manage ink flow

Options for customizing nibs and reservoirs for permanent markers

  • Customizable ink flow, capillarity, fiber types/densities, wrap materials, and sizes/dimensions
  • Maximum ink utilization
  • Highest degree of leak protection
  • Won’t fray or mushroom out
  • Sharp, clear lines
  • Long-lasting


  • Polyester fiber (PET)
  • Water-based, solvent-based, or metallic inks


  • Core Materials: Polyester or Polypropylene
  • Exterior Materials: Extruded polypropylene, extruded nylon, extruded polyester, film & nonwoven
  • Inks: Water-based, solvent-based, metallics, high pH
  • Manufactured into nearly any imaginable shape
Porous Laboratory Components

Watch our On-Demand Webinar

Using Porous Polymers for Applying

Related Resources

The Science of Ink Flow Management Brochure

For over 50 years, POREX® has been the trusted choice for optimized nib and reservoir combinations that deliver exceptional performance and an enhanced writing experience.

How it Works Video Series: The Science of Ink Flow Management

How does a coloring or whiteboard marker apply ink consistently without leakage to a paper? See how it works in this video.

High-Efficiency Reservoirs Brochure

Learn more about POREX® high-efficiency reservoirs for writing instruments, designed to reduce ink waste while simultaneously enhancing writing performance.

Partnering with Crayola Video

Learn more about Porex’s longstanding partnership with Crayola for coloring marker reservoirs and nibs, including a story about the impact Crayola markers have had on our HR manager’s non-verbal son’s life.