posca uni PC-8K Water-Based Broad Chisel Paint Markers — White, 8mm Tip, 2-Pack — Opaque, Removable Nibs

The posca uni PC-8K is a water-based broad chisel-tip paint marker that lays down opaque white coverage for large areas and expressive calligraphic curves.

Whether you’re customizing a skateboard, adding highlights to ceramics, or refreshing a piece of furniture, these PC-8K markers deliver thick, vivid white ink that works on more than 50 surfaces. This 2-count pack contains two 8mm chisel tips that combine precision edge lines with wide coverage, and the washable removable nibs make maintenance simple. The pigment is formulated to be permanent on porous materials and removable on many non-porous surfaces, giving you versatility for indoor and outdoor projects.

How does the 8mm chisel tip perform for both detail and coverage?

The chisel tip is designed to create a range of strokes: a thin edge for controlled lines and a broad face for filling large areas. That duality makes it easy to switch between outlining, lettering, and blocking in colour without changing tools. Users can also angle the tip to produce calligraphic effects and consistent coverage.

• 8mm chisel tip allows narrow strokes and broad fills
• Consistent ink flow maintains even coverage across surfaces
• Tip can be removed and rinsed to restore performance

Which surfaces are best suited for these water-based paint markers?

POSCA paint works on a wide variety of materials, including porous and non-porous substrates. On wood, paper, and fabric the pigment bonds and becomes permanent; on glass, metal, and plastic it often wipes away if desired. This adaptability makes the markers useful for craft, decor, automotive trim, and hobby projects.

• Permanent on porous materials like wood and paper
• Removable or erasable on many smooth non-porous surfaces
• Suitable for glass, metal, plastic, leather, ceramic and more

What maintenance and longevity can I expect from these markers?

These markers are water-based and quick-drying, so cleanup and storage are straightforward. The nibs are removable and washable, which helps extend usable life and keeps strokes clean. Stored upright with caps secured, they retain ready-to-use performance for long-term projects and occasional touch-ups.

• Quick-drying ink reduces smudging on completed work
• Removable nibs allow rinsing to clear clogs or colour residue
• Store capped and upright to preserve ink flow

Can these markers be used outdoors and are they non-toxic?

Yes, the ink is formulated for both indoor and outdoor use, performing well on exterior projects when applied to suitable porous surfaces. The markers are water-based and non-toxic, but they are not intended for children under 12. For outdoor longevity, consider surface preparation and sealing with a compatible varnish if exposure will be heavy.

• Water-based, non-toxic pigment suited for many outdoor tasks
• Permanent on porous surfaces; seal painted areas for added weather resistance
• Not recommended for children under 12

Who is this for: The posca uni PC-8K 8mm white markers are ideal for artists, crafters, sign-makers, hobbyists, and decorators who need bold white coverage with flexible stroke control. Choose this two-pack when you want a dependable white paint marker that handles broad fills, lettering, and surface details across a wide range of projects.