Tombow Replacement Lead for Monowork HB

Mechanical lead “HB/B for MONO WORK” (8 pieces) is a new mechanical lead that is scans correctly by reading devices, does not break easily, and is suitable for mark sheet tests yet allows for neat corrections. This is the first time we have released a 1.3 mm mechanical lead.

Make marks using almost the same amount of graphite as a pencil lead
A line drawn with this mechanical lead contains almost the same amount of graphite as a line drawn with a pencil lead. This mechanical lead has a looser bond than regular mechanical leads (our company), increasing the porosity and this increasing the amount of graphite applied.This mechanical pencil has been rated as having a reading accuracy of 99.99% in tests conducted by a major optical mark reading device manufacturer. This reading accuracy is the same as that of our “mark sheet pencils.”

A thick, strong lead is hard to break, can be fixed quickly even if dropped off a desk.
The strength of this lead, which measures how hard it is to break, is about 3.7 times that of our 0.5mm lead (HB). It is rare for the lead to break while writing. In the unlikely event that the lead breaks, such as if you drop the mechanical pencil on the floor, you can simply pull out the broken lead portion and resume writing.

One lead can write approximately 682 meters (practical length for HB) .
Writing distance (practical length) of one mechanical lead is approximately 682m for HB and approximately 276m for B (measured with a writing pressure of 300g). Assuming that a writing distance of approximately 2cm is required to mark one answer section, for HB one mechanical lead can mark 34,100 questions (internal estimated value).

Easily erased
Highly erasable lead that allows mistaken answers to be easily erased with a regular eraser. After corrections only 5% of the graphite remains in the answer section (according to our test/Mono PE), which is the same level as with a pencil lead. This reduces the risk of reading errors caused by corrections (erasing).