Fabric science A maker of fabric for clothing is setting up a new line to “finish” the raw fabric. The line will use either metal rollers or natural-bristle rollers to raise the surface of the fabric; a dyeing-cycle time of either 30 or 40 minutes; and a temperature of either 150° or 175°C. An experiment will compare all combinations of these choices. Three specimens of fabric will be subjected to each treatment and scored for quality.