User:NPRB/sandbox4

Types of Sketching Pencils

9B	Very Soft	Drawing, sketching, and shading
8B	Very Soft	Drawing, sketching, and shading
7B	Very Soft	Drawing, sketching, and shading
6B	Very Soft	Drawing, sketching, and shading
5B	Soft	Drawing, sketching, and shading
4B	Soft	Drawing, sketching, and shading
3B	Soft	Drawing, sketching, and shading
2B	Soft	Drawing, sketching, and shading
B	Soft	Drawing, sketching, and shading
HB	Medium	Writing as well as technical drawing
F	Medium	Writing as well as technical drawing
H	Hard	Marking crafts and technical drawing
2H	Hard	Technical drawing
3H	Very Hard	Technical drawings and detailed technical drawings
4H	Very Hard	Technical drawings and detailed technical drawings
5H	Very Hard	Technical drawings and detailed technical drawings
6H	Extremely Hard	For very special purposes
7H	Extremely Hard	For very special purposes
8H	Extremely Hard	For very special purposes
9H	Extremely Hard	For very special purposes

Formula 1 Tyres Table

Formula One tyre compounds supplied by Pirelli

No.	Compound details						Tread	Driving conditions	Speed	Grip	Durability
C0		Hard (white)					Slick	Dry	6 – Slowest	6 – Least grip	1 – Most durable
C1				Medium (yellow)					5	5	2
C2						Soft (red)			4	4	3
C3									3	3	4
C4									2	2	5
C5									1 – Fastest	1 – Most grip	6 – Least durable
–				Intermediate (green)			Treaded	Wet (light standing water)	—
–				Wet (blue)				Wet (heavy standing water)	—
No.	Compound Details						Tread	Driving Condition	Speed	Grip	Durability
C6		Ultrasoft (Purple)					Slick	Dry	12 — Fastest	Grade 12 — Most Grip	Grade 12 — Most Durability
C7				Hypersoft (Pink)					11	11	11
C8									10	10	10
C9						Ultrahard (Orange)			9	9	9
C10									8	8	8
C11									7	7	7
C12									6 — Slowest	6 — Least Grip	6 — Least Durability