Uni Mitsubishi Hi-Uni 5H Pencil – Box of 12 | Ultra Hard Graphite for Precision Drafting & Fine Detail

Uni Mitsubishi Hi-Uni 5H Pencil – Box of 12

At the extreme end of precision, the Uni Hi-Uni 5H is the tool of choice for architects, engineers, and technical illustrators who demand the finest possible line with the lightest possible touch. Harder than 4H, the 5H grade produces an almost invisible graphite trace — perfect for intricate construction grids, engineering diagrams, cartographic work, and underdrawing where zero graphite residue is essential. Made in Japan by Mitsubishi Pencil Co., it delivers the Hi-Uni’s signature smoothness at a grade where most pencils feel like scratching glass.

✦ Key Features

• 5H Ultra Hard Grade – Feather-Light, Needle-Fine Lines: One step harder than 4H, the 5H produces an exceptionally fine, near-invisible mark — the standard choice for engineering diagrams, cartographic linework, and precision construction grids
• Smooth Despite the Hardness: Hi-Uni’s proprietary graphite formula is engineered to minimize the harsh, abrasive feel common in ultra-hard pencils — delivering a controlled, surprisingly smooth stroke even at 5H
• Maximum Point Retention: The ultra-hard graphite wears down at an exceptionally slow rate, maintaining a needle-fine tip through extended sessions of detailed work without constant resharpening
• Break-Resistant Lead: Advanced core-bonding technology keeps the hard graphite core firmly anchored in the cedar casing — preventing tip snapping under the firm, controlled pressure typical of technical work
• Premium Japanese Cedar Casing: Sharpens to an ultra-fine point cleanly and consistently; fine-grain cedar ensures a smooth, splinter-free sharpening experience every time
• Box of 12: Presented in the iconic Hi-Uni gold-foil box — a complete professional set for the drafting table, architecture studio, or engineering classroom

✦ Specifications

• Brand: Uni Mitsubishi (Japan)
• Model: Hi-Uni
• Grade: 5H
• Quantity: 12 pencils per box
• Best For: Engineering drafting, architectural construction lines, cartography, precision underdrawing, technical illustration
• Origin: Made in Japan

✦ Frequently Asked Questions

Q: What is the difference between 5H and 4H in the Hi-Uni range?
A: Both are hard grades, but 5H is one step harder and lighter than 4H. It deposits an even finer, more ghostly graphite trace — virtually invisible to the naked eye at normal viewing distance. Artists and draughtsmen use 5H when they need construction lines that must not show in the finished work, or when working on very smooth, coated paper where softer grades would smear.

Q: Who typically uses a 5H pencil?
A: The 5H is primarily used by architects, engineers, technical illustrators, and cartographers who require extremely fine, consistent lines for precision diagrams and plans. Fine artists also use it for the lightest possible underdrawing — structural guidelines that will be completely covered by subsequent layers of graphite, ink, or paint.

Q: Does the 5H feel scratchy or abrasive on paper?
A: Ultra-hard pencils from lesser brands can feel harsh and damaging to paper surfaces. The Hi-Uni 5H is notably smoother than competitors at this grade, but it still requires a light touch on delicate or textured papers. For best results, use smooth, heavier-weight cartridge or Bristol paper.

Q: Can 5H lines be erased completely?
A: Yes — the 5H deposits so little graphite that it erases almost completely with a quality vinyl eraser, leaving virtually no residue. This makes it the ideal underdrawing grade for ink illustration and watercolor work where a clean, graphite-free surface is required after inking.

Q: How does the Hi-Uni 5H compare to Staedtler Mars Lumograph 5H or Faber-Castell 9000 5H?
A: The Hi-Uni 5H is consistently rated as the smoothest ultra-hard pencil in its class. Professionals in architecture and technical illustration regularly cite it as superior to both the Staedtler Mars Lumograph and Faber-Castell 9000 at hard grades — with better graphite consistency and significantly less surface abrasion.

Q: How many pencils come in the box?
A: Each box contains 12 Hi-Uni 5H pencils in Mitsubishi’s signature gold-foil presentation box.