I don't quite understand what you mean by HB-2 pencil but if you mean HB pencil / #2 Pencil it is not the softest pencil. Pencils scale from 9H to 9B, (HB in the middle) and 9B would the softest and darkest pencil there.
I've never heard of an 'HB #2' pencil. I'm saying that no one makes them! But this is what I know about pencils. 'H' pencils are typically used for graphic drawings. The lead is harder and the lines tend to be lighter and thinner. The lead is less prone to smearing. The higher the number, the lighter and harder the lead. Then we have the 'B' pencils. The lead is softer, darker, the lines tend to be thicker. As the number gets higher, these qualities increase. A 6B pencil gives a very dark, thick line. These pencils are used more commonly for sketching in the typical 'drawing', like an artist's picture. These leads smear on paper easily! As an architectural student, I'm required to use an 'HB' pencil. This is just a blend of H and B leads. It still has an annoying habit of smearing on vellum! I usually stick to H2 pencils and higher whenever possible to keep my work clean!
Pencil lead used to explode fairly easily when I lived in Bulgaria in 1995. We used to make it explode with only a lighter. It would take about a minute to make a 2 inch piece of lead explode. When I moved to America, I was sad to find that American pencil lead does not explode.
it has two parts the lead part which is lead and made up of the lead element, and the wood part which is a not-so-hard-kind of wood the#2 pencils are made up of that.
A #2 pencil will usually have the number 2 on the barrel, near the eraser end.
2
I don't quite understand what you mean by HB-2 pencil but if you mean HB pencil / #2 Pencil it is not the softest pencil. Pencils scale from 9H to 9B, (HB in the middle) and 9B would the softest and darkest pencil there.
HB 2 pencil has a slightly softer lead than a regular HB pencil, which gives it darker markings. The "2" in HB 2 stands for the American grading system, while the regular HB is based on the European grading system. Both are commonly used for general writing and drawing.
The # is reference to the hardness of lead A number 2 pencil is averagely hard aka HB
An HB pencil is just a No. 2 Pencil HB stands for Hard Black
The number two in reference to a pencil denotes the relative hardness of the graphite or "lead" that is in the pencil, HB being softer and three being harder, etc.
its the HB graphite grading scale, for hardness and darkness of the graphite on paper. the higher the number, like a number 2 pencil, the harder the lead.
The size of the lead (0.3mm, 0.5mm, 0.7mm, 0.9mm, 1.3mm, etc) is just the width of the lead. In a #2 pencil, the #2 refers to the hardness of the lead. This is where those little letters on the lead come into play on the lead refill packs. The ratings are like this: (softer) (harder) B6 B5 B4 B3 B2 B1 HB H1 H2 H3 H4 H5 H6 (darker) (lighter) Most lead refill packs you buy from places like office max, target, bookstore, etc will be HB. Lead that comes with brand new mechanical pencils is almost always HB. This "mid-range" hardness is equivalent to #2 lead in a #2 pencil. The other kinds of lead are pretty much only sought after by drafters and you'll probably only find them in a drafting supply store or a specialty office store. So the answer to your question: it probably is, but not because it's 0.7mm. rather, it probably is because HB lead is the most common and most likely to have come with your pencil.
A No.2 pencil, but HB is softer and is used to create dark lines when drawing.
It's softer. #1 softest, #2 slightly harder, #3 harder than #2, etc.Softer.a #1 pencil is softer than a#2 pencil
the mechanical pencil will write better because it has a skinnier lead, so the pencil doesn't go flat if you write too much on one side. the lead also still graphite, but has special substances in it to help you write better. Still, if your pencil is certified HB#2, it can be used on Scantron Genuine Forms and State tests.
you take 2 HB or 2B pencil,rubber and a sharpener
Numbers and letters on the sides of some pencils (Art & Drafting pencils) is used to signify the type of lead that it contains, or more specifically the hardness of that lead. The higher the number/letter combination, the harder the lead. Conversely, the lower the number/letter combination, the softer the lead. The typical pencil (#2 pencil) contains HB Grade lead. PencilPages.com notes (from The Pencil Hardness Test); "The hardest is a 9H, followed by 8H, 7H, 6H, 5H, 4H, 3H, 2H, and H. F is the middle of the hardness scale; then comes HB, B, 2B, 3B, 4B, 5B, 6B, 7B, 8B, and 9B, which is the softest. Another grading method uses numbers; the equivalents would be #1=B, #2=HB, #2-1/2=F, #3=H, and #4=2H." The H represents hardness and the B represents blackness.