Greige Storage Conditions Impact on Subsequent Dye Absorption
Uncontrolled greige storage triggers moisture migration, lipid autoxidation, and sizing retrogradation, which impair surface wettability and cause severe dye absorption variances.
Water Drop Absorbency
Absorbency Measurement
Time required for a droplet of water to be fully absorbed into a textile specimen indicates the hydrophilic character and cleanliness of the fabric. This testing metric, known as water drop absorbency, is used to verify the effectiveness of the scouring and bleaching processes. It measures the presence of residual hydrophobic substances like waxes and oils on the fiber surface.
The measurement is conducted under controlled laboratory conditions on a flat, horizontal fabric surface.
Procedure Details
A burette positioned above the fabric sample releases a single water droplet of a standard volume. The operator starts a stopwatch as the droplet contacts the fabric and stops it when the reflective water dome disappears. Wetting times of under three seconds are typical for well-scoured and bleached cotton fabrics.
Longer times indicate incomplete preparation and the need for re-processing.
Influence Factors
The result is highly sensitive to the fabric’s initial moisture content and the ambient humidity during the test. For this reason, samples must be conditioned for twenty-four hours before testing.
Process Decisiveness
Dye houses use this quick test as a gatekeeping check before releasing fabric lots to the dye pad. A uniform wetting rate across the fabric width prevents unlevel dyeing.