Vertical Wicking and Horizontal Spreading Tests
topic
Vertical wicking tests measure the capillary-driven rise of liquid up a vertically suspended fabric strip over a defined time period, quantifying the fabric's longitudinal liquid transport capacity along warp or weft directions through the height of the wetted zone at standardised time intervals. Horizontal spreading tests assess the radial spreading rate and maximum spread area of a defined liquid volume deposited on a horizontally positioned fabric specimen, characterising the planar wicking behaviour relevant to sweat distribution across a garment panel. Together these tests characterise the anisotropic wicking behaviour of woven and knitted fabrics where liquid transport differs significantly between fabric directions due to yarn orientation, fibre type distribution, and fabric construction geometry.
Role
Vertical wicking and horizontal spreading tests provide the directional liquid transport characterisation that is essential for designing moisture management into structured fabric constructions — revealing how yarn orientation, fibre type placement, and weave or knit architecture create preferred wicking pathways that fabric engineers exploit to direct sweat away from specific body zones, underpinning the design of performance base layers and next-to-skin sportswear where directional moisture transport is the key engineering objective.