Test 1 Flashcards
DPI
Dots per inch. How many dots are being printed per inch on paper. (inside machine)
Blueline
Order of page printing. Basically obsolete.
Continuous tones
Colors blend from one to another. Photographs. Uses grays and color gradation.
Dot Gain
Increase in half tone. Ink spreads when absorbed into the paper.
Line art
Can be enlarged without blurring
Halftone screens
Size of dot and spacing controls value. Printer cannot control amount of ink it lays down.
Screen angles
Colors are printed at different angles so that you can see all the colors. Printer does it for you.
Image resolution
Measured in ppi. 300 ppi is optimal.
Spot color
Pure color. Unaltered.
Knockout
Doesn’t overlap colors. Plain paper under each color.
Overprinting
Colors lay over each other. Effect each other.
Trapping
Colors overlay ever so slightly so there is no white gap in print.
Web press
Feeds a roll of paper
continuous feed
quality is not as high as sheet fed
Prepress
everything that happens before it goes to print
Offset Printing
Plate is dampened with water in areas where ink is not wanted. Cylinders roll oil-based ink on where water is not present. Pressure controls amount of ink laid down.
Variable Data Printing (VDP)
Parts of the piece are customized for the recipient (name, location)
Digital Printing
Size 19"x12-14" Image is projected on to paper Up to 2500 copies is most economical Turn around time is less that offset Can VDP
65 lines per inch
screen printing
85 lines per inch
newsprint
150-180 lines per inch
commercial prints on coated stock
130 lines per inch
commercial prints on uncoated stock
lines per inch
how many lines are printed per inch (finished product)
self cover
cover is part of the signature (same paper from imposition)
saddle stitch
wire stapling at the center of a magazine or pamphlet
perfect binding
unsewn, flat-spined binding made with glue
side-stitching
stapling through the spine of a publication from front to back. Book can’t lie flat
signature
group of pages printed on the same sheet, front & back. 16 is magic # of pages
flexography
relief printing using a flexible rubber plate printing plate (primarily for printing labels-pressure sensitive)
moire pattern
Dot problem with how things are lined up. Angle of dots is off.
Work-and-tumble
front and back images share a single plate. Prints one side, then flips end-to-end to print on other side. New gripper edge after flipped.
Work-and-turn
Sheet-fed printing. Front & back share plate. Printed on one side and then turned side-to-side so that back can be printed. Doesn’t change gripper edge at top. SAVES PLATES
imposition
all pages are arranged and printed on a big sheet, then folded and edges cut off so that the signature is in the right order.
spot color
pure color from a color book/system
Direct to Plate
Goes from the computer and is burned directly to aluminum plate- What we use now
difference between photo film and color separation film
color separation film is a film that must be burned onto plate for each color in CMYK. Not used anymore.
sheet fed
one sheet at a time
higher quality that web press
densitomotor
used to measure density of ink
