Uni Posca PC-1M Extra Fine Markers - 12 Color Set - Water-Based

5. Who is this for?

1. The Urban Planner Who Wants Precision and Permanence

You need to create detailed, durable sketches and diagrams on various surfaces, from presentation boards to physical models, where accuracy and clean lines are non-negotiable.

2. The Bullet Journal Enthusiast Who Wants Vibrant, Bleed-Proof Detail

You meticulously craft your planner as a functional work of art and demand pens that offer intense color without ghosting on thin paper, allowing for intricate doodles and color-coding.

3. The Model Kit Builder Who Wants Authentic, Fine Detailing

You seek the perfect tool for adding crisp panel lines, tiny markings, and weathering effects to scale models, where pigment-based opacity and a fine tip are critical for realism.

4. The Crafty Parent Who Wants Versatile, Kid-Safe Creativity

You want a high-quality, non-toxic art supply that works on rocks, Easter eggs, and homemade cards, offering vibrant results that are easy to clean up but hard to wash away accidentally.

5. The Stationery Aficionado Who Wants Japanese Quality and Curation

You appreciate expertly designed tools and collect functional art supplies; this set represents a curated color palette and renowned Japanese engineering for everyday writing and sketching.

Crisp Details Every Time

Stop fighting with blurry lines. The extra fine tip gives you surgical control for tiny illustrations, planner decorations, and model painting, exactly where you want the color.

Colors That Pop, Even on Black

No more ghostly, washed-out marks on dark surfaces. Get vibrant, opaque coverage that makes your designs stand out boldly on ceramics, rocks, or dark cardstock.

No More Skipping or Blobbing

The reliable pump system means ink flows smoothly the moment it touches the surface. Start your project with confidence, not frustration.

Your Art Survives Real Life

Create worry-free. Once dry, your artwork is waterproof and smudge-proof, so a spilled drink or rainy day won't ruin your work.

One Set for All Your Projects

From customizing sneakers to journaling to holiday ornaments. These markers work on almost anything, so you can finally execute all those creative ideas you've pinned.

Clean Up with Just Water

Accidents happen. Easily clean wet ink from skin, clothes, and work surfaces with just soap and water—no harsh solvents needed.

Outlasts Cheap Markers

The refillable design and long shelf life mean these aren't disposable. It's the last set of detail markers you'll need to buy for years.

Professional Results at Home

Feel the difference of a tool made to Japanese industrial standards. That satisfying, consistent glide and rich color payoff turn any project into a pro-level creation.

1. **0.7mm Extra Fine Nylon Tip** — Engineered for pinpoint precision in detailing, technical drawing, and fine lettering without fraying.

2. **Patented Valve-Action Pump System** — Prevents leaking and allows instant start-up, even after weeks of non-use, ensuring consistent ink flow.

3. **High-Opacity, Water-Based Acrylic Ink** — Provides vibrant, opaque coverage on both dark and light surfaces including black paper.

4. **Permanent & Waterproof When Dry** — Once fully dried (approx. 3 minutes), artwork becomes waterproof and smudge-proof for lasting results.

5. **Works on 100+ Surfaces** — Formulated for use on paper, wood, stone, metal, plastic, ceramic, fabric, and glass.

6. **Lightfast Pigments** — Select pigments are rated for excellent lightfastness, reducing fading for displayed artwork.

7. **Low-Odor Formula** — Developed for comfortable use in studios, classrooms, and homes without harsh chemical smells.

8. **Refillable Design** — Compatible with PC-1MR ink refill cartridges to extend marker life and reduce waste.

9. **Japanese Industrial Standards (JIS) Certification** — Meets strict Japanese quality and safety standards for stationery products.

10. **ISO 9001 Certified Manufacturing** — Produced in a facility certified for consistent quality management systems.

11. **Vibrant 12-Color Spectrum** — Curated set includes essential primaries, secondaries, and popular hues for versatile project work.

12. **Quick-Drying Ink** — Dries to the touch in under 60 seconds on most non-porous surfaces, enabling faster workflow.

1. **Prime the Tip:** Before first use, press the tip down on a scrap surface until ink flows (usually 5-10 presses).

2. **Shake Well:** Shake the marker with the cap on for 5-10 seconds to mix the pigment.

3. **Store Horizontally:** Keep markers lying flat to ensure even ink distribution and prevent tip drying.

4. **Cap Tightly:** Always replace the cap immediately after use with a firm click to prevent drying.

5. **Surface Test:** Always test on an inconspicuous area of your chosen material (wood, plastic, ceramic, etc.).

Timeline Expectations:

- **Week 1:** Experience immediate, opaque coverage on dark and light surfaces. Notice the smooth, skip-free flow and the fine tip's ability to handle intricate details and lettering.

- **Week 2-3:** Build confidence using the markers on diverse materials (rock, fabric, glass). The consistent ink delivery and quick-drying formula become second nature for layered work and mixed-media projects.

- **Week 4+:** Rely on Posca as your go-to tool for permanent, waterproof (after drying), and lightfast artwork. The long shelf life and refillable design (with PC-1MR refills) make it a sustainable staple in your creative toolkit.

Born from a simple frustration in the Japanese design community: markers that bled, faded, or couldn't handle detail work. For over 40 years, Uni Mitsubishi Pencil Co. has been solving this. The Posca PC-1M was engineered in their GMP-certified facilities to be the precise, reliable tool professional artists and hobbyists demanded. Every component, from the patented valve-action pump system to the intensely pigmented, water-based ink, is selected for one purpose: to translate your vision onto any surface without compromise. This 12-color set represents the culmination of that pursuit, becoming a top-ranked art supply in Japan for its unmatched control and versatility, trusted by illustrators, planners, and crafters who refuse to let their tools limit their creativity.

The Uni Posca PC-1M Extra Fine Markers are water-based markers that utilize a carefully formulated ink composition to deliver their signature performance. The primary ingredients include water as the solvent base, which ensures low odor and easy cleanup, along with pigments or dyes for vibrant, opaque color deposition on various surfaces. These markers incorporate acrylic resin or polymer emulsions, which act as binders to enhance adhesion and durability, preventing smudging and allowing the ink to dry quickly to a waterproof finish once set. Additionally, humectants like glycerin or glycols are included to maintain ink flow and prevent tip drying, ensuring consistent performance even after periods of non-use. Surfactants may also be present to improve wetting and smooth application across different materials. This formulation provides users with benefits such as excellent opacity for covering dark backgrounds, versatility on non-porous surfaces like glass, plastic, and metal, and the safety of non-toxic, water-based inks that are ideal for artists, crafters, and professionals seeking reliable, fine-line precision with minimal environmental impact.

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.

Uni Mitsubishi Pencil Co., headquartered in Tokyo, Japan, operates on a philosophy of 'Monozukuri'—the art of making things exceptionally well. For over a century, they have combined meticulous Japanese craftsmanship with rigorous innovation, holding over 10,000 global patents. Their state-of-the-art, GMP-certified manufacturing facilities are overseen by veteran materials scientists and chemists dedicated solely to writing and drawing instruments. Every product, like the Posca line, undergoes hundreds of quality checks, reflecting a corporate commitment to providing tools that empower precision and reliability for every user, from students to professionals.

Sold as a 12-color set in retail art supply stores, online marketplaces, and specialty cosplay/craft shops.