HOME >> COMPANY NEWS >> Pen logo
Pen logo
Source: | Author:shengmingwj | Published time: 2413 days ago | 1364 Views | Share:
Pencil lead core hardness marks, generally "H" for hard pencil, "B" for soft pencil, "HB" for hard and soft pencil, and "F" for pencil between HB and H.

Arrangement (from soft to hard) 9B, 8B, 7B, 6B, 5B, 4B, 3B, 2B, B, HB, F, H, 2H, 3H, 4H, 5H, 6H, 7H, 8H, Hardness level.

The larger the number in front of H, the harder it is, and the lighter the color. The larger the number in front of B, the softer the lead is and the darker the color is. Pencil rod classification is precisely in accordance with the amount of graphite in the refill to divide. H type of pencil, pen core hardness is relatively high, suitable for the interface is relatively hard or clear objects, such as woodworking scribing, field mapping, etc .; HB pencil pencils hardness moderate, suitable for writing under normal circumstances, or Contour; Class B pencil, relatively soft refill, suitable for painting, can also be used to fill some machine-readable card. For example, we often use 2B pencil to fill the answer sheet. In addition, there are common color pencil rod, which is often said that the color pencil, mainly for drawing.