Term
|
Definition
| continuous image, speed, inline finishing, cheaper substrates, lower basis wt (tissue), press sheet utilization, perfecting |
|
|
Term
|
Definition
| substrate cant be too thick, single pass through press, makeready time, fixed cutoffs |
|
|
Term
| substrates suited for web printing |
|
Definition
you can use really thin materials like tissue paper, but you dont want the stock to be TOO thick
requires smooth substrate |
|
|
Term
|
Definition
| printing on both sides with ONE pass through the press |
|
|
Term
| perfecting gravure and offset? |
|
Definition
|
|
Term
|
Definition
business forms, commercial print, direct mail, reatail inserts, books, mags, catalogs, directories, newspapers
packaging tag and label, products |
|
|
Term
| 5 components of rotogravure press |
|
Definition
| cylinder, doctor blade, ink fountain, dryer, impression cylinder |
|
|
Term
|
Definition
|
|
Term
| which form of splicing causes more tension on the web? |
|
Definition
|
|
Term
| why is it best to splice without stopping? |
|
Definition
| because the print balance gets interrupted when you stop the press |
|
|
Term
| ways to pre-condition the press... |
|
Definition
| heat, stretch, decurl, web cleaning, tension control |
|
|
Term
|
Definition
| when it changed from roll to sheet |
|
|
Term
|
Definition
| printing units, folder, dryers, dancer roller |
|
|
Term
| what helps bring tension down? |
|
Definition
|
|
Term
|
Definition
| everything before the first printing unit |
|
|
Term
|
Definition
| shuts down the press when the web breaks.....may contain a web severer |
|
|
Term
| 3 types of web break detectors... |
|
Definition
1. roller
2. photocell( camera looks for web by flashing a light)
3. pneumatic (blows air) |
|
|
Term
| what is lateral registration registered to? |
|
Definition
|
|
Term
|
Definition
| the press automatically adjusts the inkfeed |
|
|
Term
| registration is controlled at four spots.... |
|
Definition
1. print unit to print unit (lateral)
2.print unit to print unit (circumfrential)
3.web to folder (side lay
4. web to folder (print to cut) |
|
|
Term
|
Definition
| checks registration across the cylinder |
|
|
Term
| circumfrential registration |
|
Definition
| checks registration around the cylinder |
|
|
Term
|
Definition
| alignment of the web from left to right |
|
|
Term
|
Definition
| alignment of the web from when it is print until it is sheeted....gaged by the compensator |
|
|
Term
| what color doesnt have circumfrential registration? |
|
Definition
|
|
Term
|
Definition
| sheeted, folded sigs, roll |
|
|
Term
|
Definition
anode (+) annoyed to give away electrons; steel
cathode (-) happy to recieve electrons; copper |
|
|
Term
| chrome and copper thickness |
|
Definition
chrome=hair-like
copper= penny-like |
|
|
Term
| what gets engraved and what metal is the outside shell |
|
Definition
| cooper gets engraved and chrome is outside shell |
|
|
Term
| difference between electromagnetic engraving and laser engraving |
|
Definition
| electro everything must be screen but with laser it deosnt and with laser it is 4x faster and it can have diff shaped cells |
|
|
Term
|
Definition
| high key=highlights and low key is shadows |
|
|
Term
|
Definition
| serrated edges, wider density range than offset, excellent for shadows |
|
|
Term
|
Definition
| color separtations, reverse or small type, and making mistakes cost big mula |
|
|
Term
|
Definition
| publications, packaging, products, engraving/intagloi(money) |
|
|
Term
| does gravure dry or wet trap |
|
Definition
| dry trap, dry ink to dry ink |
|
|
Term
|
Definition
|
|
Term
|
Definition
both are grat component replacements but ...
UCR only does SHADOWS
and GRC does the entire photo |
|
|
Term
|
Definition
| integral shaft, hollow, sleeve, ballard shell |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| encases the outside of the cylinder |
|
|
Term
|
Definition
| copper coating then nickel then copper and chrome coating that goes over a hollow or integral shaft to help peel entire image layer off as a whole |
|
|
Term
|
Definition
| static is like balance of wheels of a car and dynamic is adjusting the weight at speeds |
|
|
Term
|
Definition
| put voltage in impression cylinder to assist the ink t come out of theHIGHLIGHT cell |
|
|
Term
| gravure is good for low or high key? |
|
Definition
|
|
Term
| new research involves engraving with..... |
|
Definition
|
|
Term
|
Definition
| the diameter of the cylinder should be even from side to side |
|
|
Term
|
Definition
| what you use to check for proper hardness |
|
|
Term
| to remove the previous image do you polish or grind? |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| the back up blade, provides stiffness to assembly and reduces excessive pressure |
|
|
Term
| doctor blade should contact the cylinder at what angle |
|
Definition
|
|
Term
| gravure printing variables (4) |
|
Definition
| viscosity, speed, dr blade angle, pressure |
|
|
Term
| gravure cylinders are measured in... |
|
Definition
|
|
Term
|
Definition
| the amount of current is diretly proportional to the amount of anode(metal) that is transfered to the cathode |
|
|
Term
| drive shaft v. servo-motor |
|
Definition
drive shaft is traditional and has gear systems...
servo-motor is shaftless and there are individual motors at all drive points....this is better for tension control but more complex |
|
|
Term
|
Definition
| infeed, printing units, delivery, drying criteria, and the drive shaft/servo motors |
|
|
Term
| what metals is electroplating needed for? |
|
Definition
|
|
Term
| factors that influence (slow/speed) the electroplating process |
|
Definition
| immersion of cylinder, anode/cathode distance, temperature of the electrolyte, cleanliness of the cylinder, voltage, temp of the solution |
|
|
Term
| why is cleaning the cylinder important for electroplating? |
|
Definition
| because the metal will adhere to the grease or the dust adn make it not be as strong of a connection |
|
|
Term
|
Definition
|
|
Term
|
Definition
compressed 30 degrees
elongated 60 degrees
normal 45 degrees |
|
|
Term
| waht do screen angles help with |
|
Definition
|
|
Term
| you get an elongated or compressed cell when..... |
|
Definition
| elongated when cylinder spins faster and compressed when cylinder spinds slower |
|
|
Term
| is chrome or copper harder? |
|
Definition
| chrome is 6 times harder than copper |
|
|
Term
| copper is electroplated in two steps.. |
|
Definition
1. nickel flashed (quick coating) base -for release
2. copper plated |
|
|
Term
| what metal requires a pure small grain |
|
Definition
|
|
Term
| if you just want to make minimal changes to the cyliner what should you do.... |
|
Definition
|
|
Term
| polishing is used after...... |
|
Definition
| lathe, proofing/corrections, engraving, chroming |
|
|
Term
|
Definition
1. diamond stylus actually engraves
2. burr cleans up the excess
3. shoe tells where to engrave |
|
|
Term
| what does the shoe determine? |
|
Definition
|
|
Term
| what is slowest part of gravure process |
|
Definition
|
|
Term
|
Definition
| cell wall, channel, full cell |
|
|
Term
| how are highlighted cells created compared to full cells. |
|
Definition
|
|
Term
| which one has all the same size? laser or electromechanical |
|
Definition
|
|
Term
| laser or electromechanical engraving has extremeley small and even cell walls |
|
Definition
|
|
Term
| advantages/disadvantages for electromechanical |
|
Definition
| longer make ready, more waste, diameter wear |
|
|
Term
| advantages/ disadvantages for laser |
|
Definition
| fully automated, high speed, tighter control, ink savings |
|
|
Term
| advantages/disadvantages of cylinder types |
|
Definition
| hollow is shaftless so can be taken off, ballard can be pullled off, sleeve can be taken off but integral shaft is stuck on press |
|
|
Term
|
Definition
| to wipe excess ink from non printing area |
|
|
Term
|
Definition
| degrease cylinder so that copper or nickle adheres well |
|
|
Term
|
Definition
| put cylinder in solution to get rid of chrome layer |
|
|
Term
| funciton of impression cylinder |
|
Definition
| holds the voltage for the electrostatic assist, and transfers the image |
|
|
Term
|
Definition
| supplies and controls how much ink is released |
|
|
Term
|
Definition
| controls time, turbulance, and temperature |
|
|
Term
|
Definition
| bars on press used to change direction of web or paper |
|
|
Term
|
Definition
| wight of 500 sheets of stock |
|
|
Term
|
Definition
| angle that dr blade comes into contact with cylinder.....should be at 60 degrees |
|
|
Term
|
Definition
| gloss coating on substrate |
|
|
Term
|
Definition
|
|
Term
|
Definition
| gap between cells for good ink release |
|
|
Term
|
Definition
| layer that coats the cylinder and it protects the copper from friction. prevents oxidation of the copper |
|
|
Term
|
Definition
the angle of the actual blade...
can have lamella tip (thinner and rounder and helps keep thickness consistent -no changes to image when it wears)
or be beveled (when wears it shows changes in the image) |
|
|
Term
|
Definition
| layer around cylinder that gets engraved |
|
|
Term
|
Definition
| gravure has a fixed cut off (cuts paper at specific size) |
|
|
Term
|
Definition
| roller that helps to detect web tension (and breaks) |
|
|
Term
|
Definition
| ink in gravure cell doesnt release so you get a donut in the middle |
|
|
Term
|
Definition
| solution that contains ions to conduct current |
|
|
Term
| electro mechanical engraving uses |
|
Definition
|
|
Term
|
Definition
| transfer of anode to cathode ...(+ to -) |
|
|
Term
|
Definition
| stores extra paper for splice |
|
|
Term
|
Definition
| gravure is gapless printing. |
|
|
Term
|
Definition
| helps keep tension on press..doesnt move just rolls |
|
|
Term
|
Definition
water=non image
oil=ink
oil and water dont mix |
|
|
Term
|
Definition
| in the tilt box....puts positive tension on the rolls |
|
|
Term
|
Definition
|
|
Term
|
Definition
| put behind blanket on web presses for cushion |
|
|
Term
| roll stand break is controlled by... |
|
Definition
|
|
Term
| tension transducer system |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| finer screens transfer less ink, take longer to engrave, wears quickly |
|
|
Term
|
Definition
|
|
Term
| laser engravers use waht type of metal? |
|
Definition
| zinc because it is non refective |
|
|
Term
|
Definition
| image is chemically etched |
|
|
Term
| laser imaging with chemical engraving uses what? |
|
Definition
| black laquer with coating-resist |
|
|
Term
| laser iamging with reverse eletroplating uses.... |
|
Definition
-crea
-re-collects material from cells |
|
|
Term
|
Definition
| putting smaller cells in the gaps of the larger cells |
|
|
Term
| 2 types of fine line engravers |
|
Definition
1. extreme engraving (HELL)-uses a seperate head
2. Transcribe engraving syystem-uses SINGLE head and is software related |
|
|
Term
|
Definition
Dissolvable copper plating technology
-dissovles copper in a solution
-uses and anode solution rather than copper nuggests in an anode basket |
|
|
Term
| Major components of gravure print unit? |
|
Definition
1. cylinder
2 ink fountain
3 dr blade
4 imp cylinder
5. dryer |
|
|
Term
|
Definition
| allows cartridge swapping, off press makeready, and you can stage the next cylinder so they press can keep running |
|
|
Term
| Primary roll of doctor blade |
|
Definition
| keep ink off non-image area |
|
|
Term
| important issues with the dr blade |
|
Definition
| blade tip, blade angle, and distance from nip |
|
|
Term
| set angle v. contact angle |
|
Definition
set angle the angle it is loaded into the dr blade holder (60 degrees0
contact angle is the ange of contact witht he cylinder |
|
|
Term
|
Definition
| bevel, reduced thickness, radius |
|
|
Term
| what deos the backer blade do? |
|
Definition
|
|
Term
| key points of blade assembly |
|
Definition
| quick, ripple free and repeatable |
|
|
Term
|
Definition
| (movement back and forth)...it reduces ink rivers, minimizes local wear, and removes debris |
|
|
Term
|
Definition
| how wipe changes after wearing occurs |
|
|
Term
| optimum wiping angle will.... |
|
Definition
| minimize cylinder wear, give cleanest printing results and allow highest speeds |
|
|
Term
| what material is dr blade? |
|
Definition
|
|
Term
|
Definition
| scrape (cant be avoided with dr blades) |
|
|
Term
|
Definition
| metal breaks because there is too much PRESSURE on the blade (can be avoided) |
|
|
Term
|
Definition
| water based inks cause deterioration (can be avoided) |
|
|
Term
|
Definition
| change substrate or alter pH |
|
|
Term
| what material is hte impression cylinder? |
|
Definition
|
|
Term
| do you need a harder or softer impression cylinder for rougher substrates? |
|
Definition
|
|
Term
| is the TIR for impression cylinder higher or lower than the print cylinder? |
|
Definition
|
|
Term
| what is the mp. cylinder driven by? |
|
Definition
|
|
Term
| how much pressure do you want to use with the imp cylinder? |
|
Definition
|
|
Term
| ESA is particularly helpful with what type of ink? |
|
Definition
|
|
Term
| with ESA what gets charged? |
|
Definition
|
|
Term
|
Definition
good print quality in highlights..
lower pressure
higher press speeds
reduced heat
less expensive stock
NEGATIVE=STATIC |
|
|
Term
|
Definition
| time, turbulance(moving air) and temp |
|
|
Term
| what temp does ink catch on fire? |
|
Definition
|
|
Term
| what type of ink is used in FILM and PUBLICATION? |
|
Definition
|
|
Term
| what inks print on PAPERBOARD products? |
|
Definition
|
|
Term
| PRO/CON of water based ink? |
|
Definition
| good ink release but doesnt adhere as well to substrate |
|
|
Term
| UV and EB Inks work by... |
|
Definition
| wiping the non image area.....but there are viscosity problems |
|
|
Term
| viscosity measure with..... |
|
Definition
| efflux cup (zahn shell iso) as a measure of seconds |
|
|
Term
| 2 types of automatic viscometers... |
|
Definition
| ball(how faast it falls) and cylinder(how fast it spins) |
|
|
Term
| how many engraving heads for pub and pack |
|
Definition
|
|
Term
|
Definition
| (clarity) haze in non image area relatied to blade failure |
|
|
Term
|
Definition
random little spots showing through midtones and highlights
-impression of rough substrate |
|
|
Term
|
Definition
| occcur because of damage to doctor blade (nick in the blade) |
|
|
Term
|
Definition
fine hair like lines that whisker beyond border of the image..
occurs because of static buildup from ESA
"like kissing a paper...the ink pulls back" |
|
|
Term
|
Definition
| failure of printed ink to form a complete film.....usually due t surface tension |
|
|
Term
|
Definition
| solvent vapors get trapped under the dry ink film |
|
|
Term
|
Definition
|
|
Term
| ink sequence is determined by....? |
|
Definition
|
|
Term
| surface energy of ink must be higher or lower than the film? |
|
Definition
|
|
Term
| how to change surface tension? |
|
Definition
| surface treatments like corona(electronic) plasma(gas) and flame(heat) |
|
|
Term
| properties of film and foil.... |
|
Definition
waster vapor transmission rate
oxygen transmission rate
surface energy
tensile strength
coefficient of friction
haze |
|
|
Term
|
Definition
books
direct mail
newspapers
inserts
magazines
business forms
folding cartons |
|
|
Term
| Quad graphics is a unique company because.... |
|
Definition
| they are based on culture, made a community out of a print company |
|
|
Term
| largest privately owned print company? |
|
Definition
|
|
Term
|
Definition
| print 4 colors on 3 units...unit prints 2 colors on one side of web (uses DIRECT LITHO) |
|
|
Term
| WE (the goss) can print what size news papers? |
|
Definition
| broadsheet, tabload, magazine |
|
|
Term
| if goss press had a double former it could..... |
|
Definition
| do ribbons and diff sections |
|
|
Term
|
Definition
| binding = attatcing finishing = everything else |
|
|
Term
|
Definition
| commercial and newspapers |
|
|
Term
| what deos ribbons allow for? |
|
Definition
| diff page combinations in diff ways |
|
|
Term
| components of the combo folder..... |
|
Definition
| former board, jaw folder and quarter folder |
|
|
Term
| jaw folder is used for..... |
|
Definition
|
|
Term
| quarter fold is used for? |
|
Definition
|
|
Term
| combo folder fold...per or parralell to web? |
|
Definition
|
|
Term
| former board folds perp and par to web |
|
Definition
|
|
Term
|
Definition
| roller top of former...slits papers and marrys all of the webs |
|
|
Term
| jaw folder folds with or against grain? |
|
Definition
|
|
Term
|
Definition
| pins,cut from web, tucker blade to create protrusion, and then jaws |
|
|
Term
| double jaw makes what fold? |
|
Definition
| double parralell fold (2 up digest or pocket size) |
|
|
Term
|
Definition
|
|
Term
|
Definition
| RTF perf (across the head) or the......Cross Perf (full web-magazine) |
|
|
Term
|
Definition
|
|
Term
| what directs the ribbons? |
|
Definition
| angle bar directs ribons to jaw folder |
|
|
Term
| double former allows for what? |
|
Definition
|
|
Term
| does double former produce long or short grain sigs? |
|
Definition
|
|
Term
|
Definition
| folded married sigs that THEN come together and get marries |
|
|
Term
|
Definition
|
|
Term
| specifications promote.....(2 things) |
|
Definition
|
|
Term
| quality is mainly measured by.... |
|
Definition
|
|
