Clutch Pencil leads 0.5mm

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R6.90

SKU:: 44500000-S

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Clutch Pencil leads 0.5mm

12 Leads in a Tube

Fits all 0.5mm clutch or Mechanical pencils

What does HB lead mean?

HB GRAPHITE SCALE\n\nThe second graphite grading scale is known as the HB scale. Most pencil manufacturers outside of the U.S. use this scale, using the letter H to indicate a hard pencil. Likewise, a pencil maker might use the letter B to designate the blackness of the pencil's mark, indicating a softer lead.

Why is it called pencil lead?

Because chemistry was a young science at the time, people thought graphite was a form of lead; hence the name given to pencils. The next step in the evolution of the pencil came in the late 1500s, when graphite rods were placed inside wood sleeves that were glued together. This made pencils easier to use with Clutch Pencil leads

Is B lead softer than HB?

B on its own is just a little softer than HB. 2B, 3B and 4B are increasingly soft. Further up the range, 9B is the very softest lead available, but so soft and crumbly that it's rarely used. Anything over 4B is probably too soft for most people's day-to-day use.

A mechanical pencil, also clutch pencil, is a pencil with a replaceable and mechanically extendable solid pigment core called a "lead" The lead, often made of graphite, is not bonded to the outer casing, and can be mechanically extended as its point is worn away as it is being used. Other names include microtip pencil, automatic pencil, drafting pencil, technical pencil, click pencil,pump pen, pump pencil, lead holder, pacer (Australian English)^{[citation needed]}, propelling pencil (Australian English),^[1] pen pencil (Indian English), and lead pencil (Bangladeshi and American English).\n\nMechanical pencils are used to provide lines of constant width without sharpening in technical drawing and in quick, neat writing. They have also been used for fine-art drawing. Since they do not have to be sharpened, they are also very popular with students. Mechanical pencils were first used in the 18th century, with many designs patented in the 19th and 20th centuries.

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