There’s no standardised definition of No 2 or of HB but they are both the same thing – the ordinary everyday writing grade. No 2 and HB are both lead hardness grade scale measurements. One manufacturer’s idea of #2 can be quite different from another’s, there is a big range of lead hardness, darkness, etc that are all called Number 2. The manufacturer just makes what they think is their ordinary everyday writing grade pencil and calls it No 2. #2 just means it’s their standard writing grade normal hardness / darkness pencil. There are no rules, standards, test methods, etc to define it. I personally believe all this to be true, from having used a pencil or two over the years and from the accumulated wisdom of commenter’s on this and other blogs, but nothings certain apart from death and taxes. I think this is all covered in various other posts on this blog, but I’m going to try and be a helpful guy and put it all in one place, all nice and succinct. She’s been crying ever since she got home from school.” Well hopefully this posting will let you dry those tears and sleep easy. Then there are the emails from the parents of weeping children – “My daughter had one of those fill in the bubble tests at school today and she used a mechanical pencil, but they were supposed to use a #2 pencil, and now she’s terrified the machine isn't going to read her paper properly and she’s going to fail. I get a fair few hits from people searching with terms like those above. Is HB mechanical pencil the same as No 2 pencil?Ĭan I use a HB mechanical pencil on an OMR Bubble Scantron test? #2 Pencils, HB, 0.5, Scantron Bubble OMR Tests and all that stuff.
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