Denier:

The denier of a yarn is the wt. in gms of a length of 9000m of that yarn. Denier is a unit of measure for the linear mass density of fibers. If 9000 meters of yarn weigh 100 grams - the yarn is said to be 100 denier. The term micro-denier is used to describe filaments that weigh less than one gram per 9,000 meter length.

Filament Denier only relates to a single filament. Total Denier relates to a yarn, an agglomeration of filaments.

Total Denier D.P.F. =                    Quantity of Uniform Filaments

                                                           

                                                    

(D.P.F is commonly known as Denier per Filament)

If a yarn of 100 denier is composed of either 20 or 60 filaments, then the filament denier will be:

For 20 filaments yarn, D.P.F. =100/20 =5 denier -coarse filament

For 60 filaments yarn, D.P.F. =100/60 =1.7 denier -fine filament.