TRACE HOLD for deepen your pencil sketch. Its also can be produce with the different number of pencil indicate type of carbon lead that the pencil had. The smaller number is for the light trace and if the number getting bigger, so the trace become thicken. And there’s also alphabetic degree that accompanied the number, such, B, H, HB. Each has its own type of what can trace produced. Just see and trace it on some paper to get known the differences.
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