 |
Java Games: Flashcards, matching, concentration, and word search. |
 |
|
Printing Quality Problems and Their Causes
Play this game to help you prepare for the Unit 4 written test on preventative maintenance and troubleshooting. Play until you are sure you have seen all possible combinations. Enjoy!
|
| A | B |
|---|
| scumming | background dirty because of too much ink, not enough moisture, dirty dampener roller covers, or dampening covers tied too tightly |
| gray, washed out | not enough ink, too much moisture, wrong color of ink, incorrect dampener form roller pressure, incorrect plate-to-blanket pressure, or incorrect impression-to-blanket pressure |
| gray, washed out dirty background | glazed ink rollers, glazed blanket, too much ink form roller pressure, or too much damepner form roller pressure |
| copy too dark | too much ink, too much impression-to-blanket pressure, not enough plate-to-blanket presure, or too many revolutions on blanket without paper going through |
| uneven printing | incorrect ink distribution, glazed rollers, incorrect dampener form roller pressure, poor paper surface, incorrect ink form roller parallet pressure, incorrect plate-to-blanket parallel pressure, dirty impression cylinder, etc. |
| double image | loose blanket, too much ink and fountain solution, not enough plate-to-blanket pressure, loose plate, or incoreect impression-to-blanket pressure |
| weak spots | incorrect plate-to-blanket pressure, incorrect impression-to-blanket pressure, low spots in blanket, tacky ink, tacky blanket, dirty imrpession cylinder, or blind image on plate |
| image breakdown during run | too much dampening form roller pressure, too much ink form roller pressure, too much plate-to-blanket pressure, foutain solution too strong, or end play in form rollers |
| streaking | incrrect ink form roller pressure, incorrect dampener form roller pressure, incorrect plate-to-blanket pressure, incorrect impression-to-blanket pressure, improper ink, or loose blanket |
| improprer register | loose blanket, side guides not set properly, paper not cut straight, or cam band not set |
| no image at all | not enough ink roller form pressure, not enough plate-to-blanket pressure, not enough impression-to-blanket pressure, too much moisture, glazed blanket, or glazed ink rollers |
| paper curling in receiver | too moisture or a curl in the paper |
| paper nicking on eddge | paper stop fingers too high, feed rollers not set properly, paper hitting back stop in receiver too hard |
| paper missing grippers | stop fingers incorrectly set or feed rollers out of adjustment |
| paper wrinkling | too much moisture, paper damp, too much pressure between blanket and impression cylinder, or register board not set properly |
|
|
|
|
|
|
Cheryl Cooksey, Graphic Arts Instructor |
Autry Technology Center |
| OK |
|
|
|
|
|
| |
