numbering system: definitions for direct
& indirect system along with their merits
& demerits, Types of yarn numbering
system & their mathematical form for
computation.
b) General formula for direct numbering &
indirect yarn numbering system,
derivation of specific general formulas for
different form of materials used during
yarn manufacturing. Conversion formula,
Derivation of Different conversion
formulae for direct –direct, indirect-
indirect & direct- indirect systems.
c) Concept of Universal yarn numbering
system & significance of tex system
established as a Universal system,
d) Need for yarn fineness measurement,
e) Test method used for yarn count
measurement from short length of yarn or
yarns availed from fabric piece.
f) Test method used for yarn count
measurement from longer length of yarn,
Structural features of wrap reel,
Constrains of wrap reel based yarn length
measurement, Limitations of Non
automatic wrap reel, Constrains for
accurate weight measurement. Structure
& Operating details of different balances
used for weight measurement of yarn lea
or skein prepared by wrap reel; Analytical