You often use a pencil to write, but it is above the symbol you ever noticed it? What do they mean?
Specifications pencil H and B is usually expressed as the symbol H pencil indicates hardness (hard), B represents black (black). "H" is the English "Hard" (hard) initials, indicating pencil hardness, the higher the number in front of it, the harder it represents the lead core, the more light color. "B" is the first letter of the English "Black" (black), composition representative of graphite, indicating soft pencil case and writing a significant degree, the larger the number in front of it, showed a darker color, more black.