Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
|
setoff
|
-ink coverage (sticky ink)
-pile heigh and weight of paper *less setoff for uncoated |
|
|
hickeys
|
dirt and dust will prevent blanket from receiving ink
|
|
|
register deviations
|
alignment of image
-too much pressure |
|
|
chalking
|
ink rub off, ink paper compatibility
|
|
|
doubling
|
blanket tensions
-can be circumferential or lateral |
|
|
sheet tears
|
paper damage,
small tear in blanket can ruin it ($200) |
|
|
smearing
|
contact with a machine part
-prevent using coating |
|
|
slurring
|
deformation of dots,
dots are elapsed rather than round -printing pressures and blanket tensions |
|
|
blanket smash
|
faint image where smash is
-can still sometime be used |
|
|
repelling
|
happens with 5-7 colours, additional layers of ink
|
|
|
strike-through
|
paper isn't thick enough- shows through, strike through
|
|
|
picking
|
ruptured surface, blanket holds on to too much ink, press running to fast
|
|
|
tinting
|
ink/dampening solution imbalance
get image where you don't want it |
|
|
electrostatic charge
|
seasonal- winter dry seasons
lack of humidity friction with machine parts |
|
|
ghosting
|
imbalance with ink drying and ink thats already dried
|
|
|
piling
|
ink build up, happens with heavy coverage
-stop machine and wash everything |
|
|
emulsification
|
ink in non image areas
too much dampening solution |
|
|
scumming
|
ink/dampening imbalance
pH |
|
|
wrinkling
|
too much pressure
wavy and tight edges cause wrinkles |
|
|
mottling
|
splotchy appearance (typically darker tint)
solution: changing sequence of ink |
|
|
blisters
|
heat set web moisture in paper covered with ink causes blisters
solution: speed up press, less time in oven |
|
|
peeling of ink particles
|
peeling ink off of rollers
|
