Printing Process Flashcards
Printing began in
China in the 6th century
the worlds oldest known book is
Diamon Sutra printed in 868 AD
Johannes Gutenberg invented the printing press in
Mainz, Germany in 1444
Gutenberg’s design was
based off of a wine press
Stephen Daye brought prinitng to
America in 1638
A halftone is
a photograph broken into dots
Halftones first appeared in
1891
The numbers used to describe screens
represent the number of lines per inch (LPI)
Offset printing is more cost effective for
(large runs)large quantities vs. digital printing
Digital printing is more cost effective for
small quantities
(short runs), has a faster turn around time, and allows for variable data, among other perk
RGB files are used for
monitor displays, so all digitally published files should be in RGB
RGB is an
additive color mode
CMYK files are used for
printing, so all printed files
CMYK is what colormode
subtractive
In offset printing, each color should be at what
angles in degrees:
C: 105 M: 75 Y: 90 K: 45
RIP Stands for
Raster Image Processor
2 kinds of RIP screening
halftone and stochastic
Digital printing has many advantages such as
short runs, allowing for variable data, no
film or plate costs, quicker lead time, and large format
printing
Screen printing uses
mesh stencils and film positives
any type of material can be screen printed on
including wood, fabric, glass, plastic, and met
Screen printing has many advantages, include:
it can print a heavy film of ink,short runs,
prints on almost any material
Grain direction is the direction in
which the paper is made; runs parallel to the fold to avoid curling
Shingling or creep is when
the inside pages of a section are slightly narrower than the outer page
Trapping is the
kiss fit between two colored items so that there is a small overlap
Misregister is
printing slightly out of position
Dot gain is caused by
absorption of ink and can make images appear bolder
PMS stands for
Pantone Matching System
Imposition is
the organization of the pages on each side of a printed sheet
Most offset printing processes require the paper to be
sheet-fed or web-fed
A web-fed press is
faster
sheet-fed press is better for
longer runs
Printing on both sides of the paper at the same time is
called
perfecting
An Impression is
paper is brought
into contact with the printing surface
In offset lithography, the inked image is
offset (printed) onto a rubber blanket wrapped around a rotating metal cylinder, then from the rubber blanket onto the paper
The three main cylinders of an offset printing press
are
the blanket cylinder, plate cylinder, and impression
cylinde
CTP
Computer to Plate
saddle stitching is
the booklet is opened over a “saddle” and stapled along the back
side stitching is
wire staples inserted from the front
unsewn binding is
trimmed along the back edge and bound with adhesive
