PAPER pt 2 Flashcards
what is the most popular paper-making machine?
Fourdrinier
which machine makes better quality paper? fourdrinier or cylinder?
Fourdrinier
what do calendar rolls do?
applies pressure to the papers between rollers to compress the fibers - increases their density and smooths the surface
what are some dry end treatments?
- clay coating (gaps, whiteness, printability)
- other coatings (gloss, water resist)
why does paper tear more easily in a specific direction?
the moving mesh of the paper-making machine causes fibers to align predominantly in a direction - makes it easier to tear along the grain rather than across
fold endurance is (greater/weaker) across the grain than along it
greater
what thickness delineates between paper and paperboard?
0.012 inches (300 micrometers)
when it’s humid, what happens to paper’s size?
increases
what temperature and RH is standardized for paper?
temp = 23C RH = 50%
Kraft paper characteristics and uses
- brown, unbleached
- grocery bags, wrapping
Sulfite paper characteristics and uses
- lighter, weaker, high print quality
- small bags for biscuits and confectionary
bleached paper characteristics and uses
- white, can be glossy
- bags, labels
parchment paper characteristics and uses
- translucent, gelatinized surface
- butter
glassine paper characteristics and uses
- very smooth, water and grease proof
- deli meats, cheese
cellophane paper characteristics and uses
- transparent, brittle
- chocolate