H or 2H pencils are typically used for drawing dimension lines.
Explanation:
Dimension lines, extension lines, and leader lines are all drawn as continuous thin lines in technical drawings. To achieve this thin line weight, harder pencils like H or 2H are preferred. Softer pencils (like HB or B grades) would produce thicker, darker lines, which are unsuitable for these specific types of lines as it would distract from the actual drawing. Harder leads are more precise and less likely to smudge.
Here's a breakdown:
- H Pencils: These are hard pencils that produce light, thin lines. They are ideal for creating accurate and detailed drawings, including dimension lines.
- 2H Pencils: Similar to H pencils, 2H pencils are even harder and create even lighter lines. This can be advantageous in some cases where extremely thin lines are needed for dimensioning.
Using these harder pencils ensures that dimension lines are distinct enough to be visible but not so dark as to be confused with object lines.
