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Vertical Lettering

Pencil Grade : H Height of letters or characters, h = 3.5 mm d = diameter of pencil or size of pencil = 3.5 / 10 = 0.35 mm for Lettering type B as per sp 46 : 2003 since d = h / 10 a = distance between characters / numbers / letters from Table 7.2 = 0.7 mm e = distance between words = 2.1 mm b3 = distance between baselines ( for Uppercase letters / Capital letters) = 4.55 mm Draw two horizontal construction lines ( narrow / thin continuous lines) at a distance of 3.5 mm apart as guidelines for lettering at a distance of 2.1 mm (distance 'e' )  from border lines using 2H grade pencil. At a distance of 2.1 mm (distance 'e' ) from border line using 2H grade pencil draw two vertical construction lines ( narrow / thin continuous lines) as guidelines for lettering at a distance of 3.5 mm apart , thereby creating a square space of side 3.5 mm to accommodate first letter. Similarly second letter space is marked at a distance of 0.7 mm ( distance 'a' ) Further,