Objective characterization of paint roll out application 'feel'

 
Paint roll-out application "feel" refers to the subjective evaluation of a coating under realistic application conditions. The sensorial outcome of such evaluations plays a critical role in rheology modifier development, paint formulation, paint performance qualification and, ultimately, consumer satisfaction. Despite their importance in product development, current application "feel" test methods are limited in accuracy and reproducibility and rely heavily on the subjective judgment of the evaluator(s). This paper will present the design and operation of a novel field device which fulfills the need for reliable, reproducible, quantitative data that subjective evaluation techniques leave unsatisfied. Named "Application Reader Technology" or "ART", the device is an autonomous device contained in the paint applicator that provides real-time recording of spatial and force data generated during paint roll-out process. The design of the ART device allows for field measurements by a painter in real-life conditions on any number of substrates. The application of three commercial paints are measured to illustrate how different paints impact the painting process and to serve as the basis for demonstrating the importance and utility of the ART in understanding paint application feel.