“the recognition of a colour, or of a consistency, or of a texture […] involves sensorial activities that a are quite different from those called into play for the recognition of a shape. They demand a lower level of interpretation, being concerned with more direct and closer physical contact […] homogenous, uninteresting surfaces lack a whole layer of sensorial relationships”
– Ezio Manzini, “Objects and their Skin” in: The Plastics Age. From Modernity to Postmodernity, hrsg. v. Penny Sparke, London 1990, S.115.