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2. Mechanical pencil - Wikipedia

   en.wikipedia.org/wiki/Mechanical_pencil

   Several companies such as Pentel, Pilot, and Uni-ball (Mitsubishi Pencil Co.) currently manufacture colored refill leads in a limited range of diameters (0.5 mm, 0.7 mm, or 2.0 mm) for their own products, as well as "variety packs" consisting of different colors of leads for those who want to trial different colors of lead. Koh-i-Noor makes ...

3. Colored pencil - Wikipedia

   en.wikipedia.org/wiki/Colored_pencil

   A variety of colored pencils. A colored pencil (American English), coloured pencil (Commonwealth English), [1] colour pencil (Indian English), map pencil, [2] pencil crayon, or coloured/colouring lead (Canadian English, Newfoundland English) is a type of pencil constructed of a narrow, pigmented core encased in a wooden cylindrical case.

4. Penciller - Wikipedia

   en.wikipedia.org/wiki/Penciller

   While many artists use traditional wood pencils, others prefer mechanical pencils or drafting leads. Pencillers may use any lead hardness they wish, although many artists use a harder lead (like a 2H) to make light lines for initial sketches, then turn to a slightly softer lead (like a HB) for finishing phases of

5. Pencil - Wikipedia

   en.wikipedia.org/wiki/Pencil

   Graded pencils can be used for a rapid test that provides relative ratings for a series of coated panels but cannot be used to compare the pencil hardness of different coatings. This test defines a "pencil hardness" of a coating as the grade of the hardest pencil that does not permanently mark the coating when pressed firmly against it at a 45 ...

6. Hardness scales - Wikipedia

   en.wikipedia.org/wiki/Hardness_scales

   Hardness scales may also refer to: Methods of measuring the deposit formation by hard water. The scale of Pencil hardness This page was last edited on 11 ...

7. Rockwell scale - Wikipedia

   en.wikipedia.org/wiki/Rockwell_scale

   A Rockwell hardness tester. The Rockwell scale is a hardness scale based on indentation hardness of a material. The Rockwell test measures the depth of penetration of an indenter under a large load (major load) compared to the penetration made by a preload (minor load). [1]

8. Technical drawing tool - Wikipedia

   en.wikipedia.org/wiki/Technical_drawing_tool

   Traditional and typical styli used for technical drawing are pencils and technical pens. Video of a 1930s dotted-line drawing pen. Pencils in use are usually mechanical pencils with a standard lead thickness. The usual line widths are 0.35 mm, 0.5 mm, 0.7 mm and 1.0 mm. Hardness varies usually from HB to 2H.

9. Zebra (pen manufacturer) - Wikipedia

   en.wikipedia.org/wiki/Zebra_(pen_manufacturer)

   A cross section of these barrel styles reflect different ink types. For example, the 3-series barrel is available in ballpoint, gel, mechanical pencil, fountain pen, highlighter, and rollerball pen. All Zebra stainless steel products are refillable, including leads and mechanical pencil erasers.