Standardised Forearm Prickle Wear Trial Protocol
topic
The standardised forearm prickle wear trial exposes panellists to fabric specimens in direct contact with the sensitive volar forearm skin under controlled temperature and pressure conditions for a defined contact duration, with participants rating the intensity of prickle, itch, and discomfort sensations on calibrated interval scales at specified time points during and after contact. Panel selection criteria require participants with demonstrated sensitivity to prickle stimuli and consistent rating behaviour across repeated exposures to reference fabrics, ensuring panel discriminating power sufficient to detect meaningful differences between test fabrics. The protocol controls contact pressure, exposure duration, ambient temperature, and humidity to standardise the physiological conditions that influence mechanoreceptor sensitivity and prickle perception threshold.
Role
The forearm prickle wear trial is the definitive sensory validation method for next-to-skin fabric comfort — providing the direct human sensory evidence that substantiates or refutes the prickle-free performance claims based on objective fibre diameter measurements, and serving as the reference method against which all instrumental prickle prediction models are calibrated and validated in the wool and fine fibre textile research literature.