Which mechanical pencil lead is the darkest?
The softest, and therefore darkest, grade of graphite is 10B (B = Black).
They’re not easy to source, but try Koh-i-Nor leads.
That’s also dependant what you are referring to as a “mechanical” pencil.
If you mean pencils with thin 0.3 to 1.3mm leads, then 4B is about the darkest you’ll find available..
Is 0.5 or 0.7 smaller?
0.7 is greater than 0.5 because 7/10 is larger than 5/10. 0.7 is larger than 0.5 by 0.2.
Is 0.5 or 0.7 lead thicker?
The number for the lead is the measurement of the lead thickness in millimeters. 0.7 mm is more than 0.5 mm, so 0.7 lead is bigger than 0.5 lead.
Is 0.5 or 0.7 lead better?
The, 0.7 lead will draw a wider line than the 0.5 will. The hardness of the lead determines how dark and smeary the line will be. Be aware that 0.5 lead is much stronger than 0.5. 0.5 lead is quite easy to break.
Which lead is darker HB or 2b?
Numbers are then used to indicate the degree of softness – the higher the number the softer the lead and the blacker the mark. For example, a 2B lead is softer than a B lead and will produce a blacker mark.