Application of chemical finishes

In batch processes, the amount of chemical finish to be applied is usually expressed as a weight percentage based on the original fabric weight. This relationship is often abbreviated as % owf (percent on weight of fabric) or % owg (percent on weight of goods) as seen in Equation 2.1 [Pg.8]

For example, if a softener is to be applied at 3 % owf to 500 kg of fabric, then 15 kg of softener will be used (3 % of 500 kg). It must be recognised that since nearly all chemical finishes are provided as an aqueous solution or emulsion, a knowledge of the actual solids concentration of the supplied chemical is needed to determine the actual increase in fabric weight after drying. [Pg.8]

In continuous processes where a chemical solution or emulsion is applied to a fabric, the amount of chemical actually applied to the fabric depends on the amount [Pg.8]

To determine the amount of supplied chemical added to the fabric, the % add-on is given by Equation 2.3 [Pg.9]

When the actual solids level added to the fabric is desired, the percentage of solids add-on can be found from Equation 2.5. [Pg.9]

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