1467911
Descripción
Fichas por marianneellison3, actualizado hace más de 1 año
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Creado por marianneellison3
hace alrededor de 10 años
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| Pregunta | Respuesta |
| Types of Problems in Makeready | 1. Printing Unit Problems 2. Ink Problems 3. Paper Problems |
| How To Reduce Downtime | Have a Spare Blanket Pre-Condition Paper Buy Good Quality Ink Track and Compare Performance |
| What makes good quality paper? | Free of dust and lint Absorbs ink well Clean and bright is always right |
| Why is pre-makeready important | Reduces downtime Improves efficiency |
| 3 Keys to Efficiency | Scheduling Teamwork Training |
| Glossy ink should be used…. | ….on glossy paper |
| Types of Makeready | Simple - 1 colour, 1 plate change Partial - 4 colour, 2 plate changes Full - 4 colour, 4 plate changes |
| Standard RH | 35-50% |
| Whiteness | The ability to reflect all colours equally |
| Brightness | The wattage of paper |
| Steps for Makeready | 1. Check instructions 2. Check press is running in good condition 3. Customer tells expectations 4. Get a signoff 5. Check blanket condition 6. Clean and safe environment |
| Short Fibres are | short and smooth |
| Main Makeready Operations | Maintenance, inking system washup, setting of sheet handling, plate mounting, condition blankets, pre-setting ink fountains, make trial impressions, adjust register, achieve colour/quality expectations |
| What is Lignin | 30% of a tree Turns paper yellow Needs to be removed |
| Paper is what % water and what % pulp after the wet end? | 80% 20% |
| How is a Watermark made? | Dandy Roller Wire mesh shaped like the watermark |
| Long fibres | Long and strong |
| Ingredients of Paper | Fillers - calcium carbonate, titanium dioxide Pigments Pulp Starch (sizing) Cellulose |
| Paper is what % water and what % pulp in the wet end? | 99% 1% |
| Calendaring Process | Goes through stack of rollers, each roller adds a layer of coating |
| QC Devices | Densitometer Pantone Book Colour Bar Registration Marks |
| 1 Jumbo paper roll is equivalent to what | 20 tonnes 1 streetcar |
| Ink is ___% the cost of paper for a job | 10% |
| 4 Basic Sheet Sizes | Bond 17x22 Uncoated Book 25x38 Cover 20x26 Newsprint 24x36 |
| Standard Lighting | D150 5000K |
| Paper accounts for ____% of the costs of a job | 25% |
| Most common printing sequence | KCMY |
| What does sizing do | Makes paper less wettable |
| What is basis weight? | The weight of 500 sheets of paper at the basic size |
| Wavy Edges | When dry paper goes into a humid environment |
| Tight Edges | When humid paper goes into a dry environment |
| What are the two types of pulping? | Mechanical and Chemical |
| Why is grain long preferred on press? | Loads better and causes less tension |
| What does coating do? | Creates ink holdout |
| How long does it take paper to climatize? | Full day |
| Paper Problems | Hickeys, piling, linting, picking, back edge curl, surface rupture |
| Controlling quality of materials | 1. Selection&Purchase 2. Receiving/Handling/Inspection 3. Proper Storage 4. Proper Use |
| 5 Basics of Quality Control | 1. Standardization 2. Specifications 3. Inspections 4. Proper Handling & Storage 5. Record Keeping |
| Deckle | How wide a machine is |
| What is cellulose Fibre? | Soft or Hard wood |
| What do fillers improve | smoothness opacity colour |
| Supercalendaring | Making paper and then calendaring it later on another date |
| What % of goods are printed Litho? | Over 40% |
| What causes the wear of Blankets? | Texture of paper Ink coverage Stickiness of Ink Impression settings |
| How many sheets do you use when changing ink densities before it is good to reprint? | 40-50 |
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