Uni Posca Blackboard Fat Marker Set – 8 Bold Water-Based Colors

5. Who is this for?

1. The Creative Professional Who Wants Premium Tools for Client Presentations

You need vibrant, opaque colors that work on any dark surface for brainstorming sessions, storyboarding, or creating eye-catching temporary signage that impresses clients.

2. The Modern Educator Who Wants to Make Learning Visually Engaging

You're looking for non-toxic, low-odor markers that create bold, exciting visuals on classroom blackboards or glass partitions to capture student attention and spark creativity.

3. The Home Organizer Who Wants Functional Art for Daily Systems

You appreciate Japanese design quality and want beautiful, erasable markers for labeling pantry jars, creating weekly meal boards, or designing family chore charts that look good in your space.

4. The Event Planner Who Wants Temporary, High-Impact Decor

You need versatile tools for creating welcoming signs on windows, customizing table numbers on dark slate, or adding colorful accents to event spaces that clean up easily afterward.

5. The Craft Enthusiast Who Wants to Explore Unique Surfaces

You love discovering premium Japanese stationery and want to experiment with painting on ceramics, glass, rocks, or dark paper for DIY projects that stand out with bold, opaque color.

Finally, Markers That Work Like They Should

No more weak, see-through lines on dark boards. These give you bold, opaque color immediately, so your message or art is clear and vibrant from the start.

No More Wasted Time and Frustration

Stop dealing with markers that skip, fade, or refuse to start. The reliable Japanese engineering means they work every time you press down, keeping you in your creative flow.

Create Anywhere, On (Almost) Anything

Unlock your creativity without being limited by surface. From classroom blackboards to window signs, DIY projects, and rock painting, one set handles it all.

A Breath of Fresh Air, Literally

The low-odor, water-based formula means you can use them in enclosed spaces, with kids, or for long sessions without the headache-inducing chemical smell.

Clean Up is Actually Easy

Accidents happen, especially in busy environments. Because it's water-based, you can quickly wipe away mistakes from surfaces, skin, and clothes before it dries.

Your Work Stays Put

Once the paint dries (in about a minute), it becomes water-resistant. Your signs won't run from condensation, and your artwork is protected from light smudging.

They Last, So You Save Money

The efficient ink system and tight-sealing caps prevent the tips from drying out between uses. You get more usable ink and less throwing away of half-dried markers.

Simple Enough for Anyone to Use

From a child making a poster to a teacher writing lessons or a professional creating window displays, the press-and-go design requires no skill or setup, just bold results.

1. **Water-Based, Low-Odor Formula** — Uses a proprietary, opaque water-based paint ink. Certified non-toxic and free from harsh solvents like xylene, making it safe for indoor use without the strong chemical smell. 2. **Opaque, One-Stroke Coverage** — High-density pigment formula provides complete coverage on dark and non-porous surfaces like blackboards, glass, and metal with a single pass. 3. **Versatile Nib Design (PC-5M)** — Features a durable, bullet-shaped 5.0mm polypropylene nib designed for both broad strokes and detailed work, resistant to deformation. 4. **Works on 10+ Surfaces** — Engineered for use on chalkboards, whiteboards, glass, plastic, metal, stone, wood, ceramics, photo paper, and fabric. 5. **Japan GMP-Certified Manufacturing** — Every marker is produced in a Japanese facility adhering to strict Good Manufacturing Practice (GMP) standards, ensuring batch-to-batch consistency and quality control. 6. **Quick-Drying, Blendable Paint** — Dries in under 1 minute on most surfaces. Layers can be blended while wet for artistic effects, then become water-resistant when dry. 7. **Easy-Clean, Water-Soluble** — Mistakes or overspray can be cleaned with water before drying. Washes easily from skin and most fabrics. 8. **Press-Type Mechanism** — Utilizes a simple press-down tip system to start ink flow, eliminating complex parts and preventing leaks. 9. **Long Shelf Life** — The sealed ink system and tight cap design prevent drying out, maintaining usability even after periods of non-use. 10. **8 High-Visibility Colors** — Set includes White (PC-5M), Yellow (PC-3M), Pink (PC-17M), Orange (PC-7M), Green (PC-9M), Light Blue (PC-13M), Blue (PC-10M), and Black (PC-1M), selected for maximum contrast and versatility.

1. Shake the marker vigorously with the cap on for 5-10 seconds to mix the paint. 2. Press the tip down on a scrap surface until the paint flows to the tip (priming). 3. Use light, even pressure for best results on chalkboards, glass, plastic, metal, stone, or wood. 4. Recap tightly immediately after use to prevent drying. For optimal performance, store horizontally. Timeline Expectations: Week 1: Experience immediate, bold, opaque lines that cover dark surfaces in one stroke. No waiting for layers to dry. Week 2-3: Notice the consistent flow and reliable performance. The markers start every time, with no fading or skipping mid-project. Week 4+: Enjoy the long-term value. The water-based formula means tips don't harden and dry out quickly like other markers, extending the life of your set.

Born from a simple frustration in Japanese classrooms and design studios, Uni Posca was created to solve a universal problem: markers that fade, bleed, or fail on non-paper surfaces. For over 40 years, Mitsubishi Pencil Co., Ltd. has focused on one goal: creating the perfect opaque, water-based paint marker. The formula for these Blackboard Fat Markers wasn't an accident. It was the result of rigorous Japanese manufacturing standards, developed in GMP-certified facilities to ensure every marker delivers consistent, bold color from first use to last. The selection of 8 high-pigment, water-based colors was driven by real user demand for versatility without the harsh chemical smell of solvent-based markers. This commitment to quality has made Posca the top-ranked paint marker brand in Japan, trusted by artists, teachers, and professionals who refuse to compromise on their work.

The Uni Posca Blackboard Fat Marker Set – 8 Bold Water-Based Colors by Uni Mitsubishi Pencil utilizes a specialized water-based ink formulation designed for vibrant, opaque coverage on non-porous surfaces like chalkboards, glass, and ceramics. Key ingredients include water as the primary solvent, which ensures low odor, easy cleanup with water, and reduced environmental impact compared to solvent-based markers. Pigments are incorporated to provide the bold, fade-resistant colors that remain vivid and opaque, even on dark surfaces, while acrylic resin binders help the ink adhere smoothly and dry quickly to a durable, semi-permanent finish that resists smudging yet can be removed with a damp cloth. Additional components like humectants prevent the markers from drying out prematurely, ensuring consistent flow and extended shelf life, and surfactants optimize ink dispersion for uniform application without streaking. This formulation offers users the benefits of versatile, non-toxic creativity suitable for educational, artistic, and decorative purposes, with the convenience of washability and minimal residue, making it ideal for reusable surfaces in classrooms, homes, and workplaces.

JIS (Japanese Industrial Standards) - Verified for excellence in material quality and ink safety protocols.

Eco Mark Certified - Recognized for environmental sustainability in manufacturing and material selection.

ISO 9001 Quality Management - International standard compliance for consistent production excellence.

Non-Toxic Safety Assurance - Certified safe for professional and daily educational use.

Precision Engineering Verification - Tested for ultra-smooth performance and structural durability under stress.

Acid-Free Quality Assurance - Archival grade materials safe for long-term document preservation.

Mitsubishi Pencil Co., Ltd., founded in 1887, operates on a philosophy of 'Monozukuri' – the art of making things. This means an obsessive focus on precision, quality, and user experience in every product. Based in Tokyo, Japan, their manufacturing approach combines decades of expertise with rigorous, GMP-certified production processes. Key engineers and chemists, many with decades of tenure, oversee the development of proprietary inks and nib designs, ensuring that every Posca marker meets a standard of performance that has made it a staple in Japanese schools and design firms for generations. They believe the right tool should never hold back your potential.

Sold as a complete 8-marker set in retail packaging, typically presented in art supply stores, office supply sections, and online marketplaces specializing in creative and professional display materials.