GRC 211 Lecture Notes - Lecture 4: Calendering, Ultimate Tensile Strength
28 May 2017
School
Department
Course
Professor
Document Summary
Opacity: ability to prevent the transmission of light. Gloss angle: way to measure gloss i. e. 60 degree gloss. Brightness: intensity of light reflection as specific wavelength. Strength: (bursting and surface: unrelated to grain direction) Tearing strength: resistance to tearing after initial cut. Bursting strength: resistance to rupturing on one side. Folding strength: resistance to being folded or unfolded. Tensile strength: force to snap a one-inch strip. Surface strength: resistance to rupturing on surface. The ability of gas or liquid to go through paper. Bulking number: number of sheets stacked up to one inch under 36lb/inch(psi) pressure for 30 seconds. Basis weight: pounds per ream at basic size. Felt side: weaker bc fillers that make it smoother limit fiber to fiber contact. Moisture content (never a fixed value because environment changes constantly) Less moisture in air = paper loses moisture. More moisture in air = paper absorbs moisture.
