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Pentel first developed Hi-Polymer lead in 1960. Super Hi-Polymer lead is the perfect balance of dark, strong, smooth and uniform, which is why it remains the #1 selling lead in the world.
Pentel Super Hi-Polymer Lead is extremely durable lead that is ideal for high-pressure applications. Independent testing has shown that our lead can withstand up to 123.9 grams of pressure before it will break.
The average human hair is 1,000,000 angstroms in diameter, while the typical lead microspore is only 10 angstroms in diameter. However, Pentel Super Hi- Polymer Lead is just 1 angstrom in diameter. The smaller the microspore, the easier the lead adheres to the surface of the paper for smoother writing.
The way lead is produced has a lot to do with how well it will perform. Lead with too many gaps is prone to break. Lead with too many tight spots will create excess friction and reduce smoothness. Pentel Super Hi-Polymer Lead has an extremely low variance for increased durability and more consistent lines.
Each piece of lead is equivalent to a typical woodcase pencil. Pentel Super Hi- Polymer Lead can write 617 feet per inch of lead.
Pentel Super Hi-Polymer Lead is available in a variety of hardness ranging from 4B (softest) to 6H (hardest). The softer the lead, the darker the imprint, or line produced when writing. HB lead is similar to the lead found in a #2 pencil and is guaranteed to scan on all standardized tests.
Pentel Super Hi-Polymer Lead is available in diameters from 0.3 millimeter up to 0.9 millimeter. 0.3 millimeter lead produces extra-fine lines ideal for small details. 0.5 millimeter lead produces fine lines great for accounting and general writing. 0.7 millimeter lead is the most commonly used size that is perfect for students and everyday use. 0.9 millimeter lead produces a bold line and works well for those that write with a lot of pressure or have limited fine-motor skills.
good quality leads, better than the really cheap generic ones at Wallyworld which tend to be not dark enough. Amazon's price was actually better than local.Published 1 day ago by Eduardo Abdullah Nagasaki
Write on brother...beats the dollar store lead which I find hard & brittlePublished 5 days ago by the wise one
When I bought this I thought I would receive 3 boxes with 12 tubes, in total 360 pieces of lead, instead I only got 3 tubes with 30 pieces each one.Published 9 days ago by Oscar Ortiz Morales
Too thin, breaks easily when writing. School requested this item so I guess we have to deal with it.Published 12 days ago by Maria Beram
they do the job and quality seams to be good they are soft to the wrintingPublished 12 days ago by Jose