Section 50 in The Standards of Weights and Measures (General) Rules, 1987
50. cm, on measures of nominal length equal to or more than 50 m.
(iii)Graduation lines shall be reasonably straight, perpendicular to the axis of the tape measure and of uniform thickness throughout the length.(iv)Graduation lines shall be so made that they form a clear and distinct scale and their thickness does not cause any inaccuracy of reading.(v)[***] [Omitted by G.S.R. 253(E), dated 5th April, 2004](b)Tape measures of nominal length 0.5 m to 5 m:(i)The zero graduation line may be located at the outer end of the ring or other device or may commence on the tape itself at a length equal to or greater than 50 mm from the outer end of the ring or other device.(ii)The tape measures may be graduated throughout at every millimetre or every 5 mm.(iii)The graduation lines at every 10 mm shall be marked in such a manner that there is no confusion between the 10 mm lines and the millimetre or 5 mm lines.(iv)The tape measures may be graduated on one side or both the sides. If the tape is graduated on one side, the manufacturer's name, trade mark, advertisement or other similar matter may be printed on the ungraduated side of the tape measure.(c)Tape measures of nominal length above 5 m:(i)The zero graduation line may be located at the outer end of the metal ring or on the tape itself, at a length equal to or greater than 100 mm from the outer end of the ring.(ii)The tape measure may be graduated at every millimetre, every 5 millimetre or every 10 millimetre.(iii)The graduation lines at every 10 mm shall be marked in such a manner that there is no confusion between the 10 mm graduation lines and the millimetre or 5 mm graduation line.(iv)The graduation lines at every 10 m shall have a length approximately half the width of the tape.(v)Every graduation line at 50 mm shall have the same length as the graduation line at 10 mm but may have an arrow at its end. This requirement shall not apply to tape measures graduated at every millimetre.(vi)The zero graduation line, the graduation lines at every 100 millimetres and at every metre shall have a length equal to the width of the tape.
