Enfocus PitStop Pro 11 Level B, 1Y, Maintence Technical Information Page 210
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The cyan foreground object has been set to overprint, but still, the magenta and yellow in the
background are knocked out. Confused? Remember the basic principle: If there are common inks,
the foreground inks win, even if their tint value is lower than the corresponding one of the
background ink and even if this tint value is equal to zero.
Let’s put the tint values of the above example in a table:
Resulting colorForeground objectBackground objectInk
100 %100 %0 %Cyan
0 %0 %100 %Magenta
0 %0 %100 %Yellow
0 %0 %0 %Black
See what happened? All inks are now common, even if they have a tint value of 0 %. The foreground
inks win and therefore, the 0 % magenta and yellow of the foreground object will be used, not the
100 % of the background.
•
The devil in the overprint and knockout detail
on page 210
•
Common pitfalls of overprint behavior
on page 213
11.2 The devil in the overprint and knockout detail
Determining factors
The theoretical overprint rules are simple:
• Overlapping colors are combined and printed “on top of” each other.
• If there are common inks, the foreground inks win.
But, the devil is in the detail and, in practice, things may become complicated because the following
factors determine the way in which overprint is applied:
•
Color spaces
on page 211
•
Overprint modes and object types
on page 212
For those who don’t like to read detailed technical descriptions, even if they are accurate, clear
and well-illustrated, see also:
•
The simple overprint and knockout theory
on page 207
210
Enfocus PitStop Pro
- Reference Guide 1
- Contents 2
- 1. Copyrights 12
- 2. Introduction 13
- Enfocus Preset Manager 22
- Smart Preflight 23
- Language of the PitStop 26
- Pro User Interface 26
- Enfocus Pack Manager 26
- Changing the 31
- Masking objects 31
- Creating a Database 33
- Sorting and grouping Presets 34
- 3.5 Workspaces 37
- 4. Working with PDF documents 46
- 4.4 Viewing object attributes 48
- D. Collapse button 49
- E. Fly-out button 49
- 4.5 Design Layouts 50
- Editing a Design Layout 51
- Applying a Design 55
- Layout to your Whole Document 55
- A. Trim marks 57
- B. Trim size 57
- C. Registration marks 57
- D. Bleed 57
- E. Media box 57
- A. Media box on page 59 59
- B. Bleed box on page 59 59
- C. Trim box on page 59 59
- D. Art box on page 59 59
- Media box 60
- B. Trim box on page 59 61
- C. Safe type zone 61
- D. Safety box 61
- 4.6 Working with Layers 62
- 5.1 What is preflighting? 64
- 5.2 Running a preflight check 66
- Certified PDF preflight 67
- Regular preflight 67
- 5.4 Problem reporting 74
- Locking a Preflight Profile 75
- Object Browser 78
- Solutions 78
- Sign-off 78
- 5.10 Annotated Reports 81
- 5.11 Automating preflighting 82
- 5.12 Smart Preflight 83
- 6.1 PDF workflow concept 91
- Certified PDF Preflight 96
- 6.7 Preflight and Verify 98
- 6.8 Certified PDF Preflight 98
- The Enfocus Preset Manager 100
- 6.12 Adding a session comment 102
- Saving a snapshot 104
- Comparing sessions 104
- To compare sessions 105
- Roll-back mechanism 107
- Saving snapshots 107
- PDF Specifications 108
- Online resource 108
- Subscribing member 109
- Contributing member 109
- 7. Editing objects 111
- Anchor points 113
- Direction points 113
- 7.3 Selecting objects 115
- 7.6 Replacing an object 118
- QuarkXPress,...) 120
- Fill attributes 121
- Stroke attributes 121
- 7.11 Rotating an object 126
- 7.12 Scaling an object 128
- 7.13 Moving an object 129
- 7.14 Shearing an object 132
- 7.16 Creating new shapes 135
- 7.17 Creating a new path 136
- 7.18 Editing a path 137
- To add an anchor point 139
- To remove an anchor point 139
- 7.20 Masking objects 140
- 7.22 Resampling pixel images 141
- Average Resampling 142
- SubSampling 142
- Bicubic Resampling 142
- Bilinear Resampling 142
- Bicubic B-Spline Resampling 142
- 7.23 Compressing pixel images 143
- 7.27 Selecting text 146
- 7.29 Editing a text paragraph 150
- 7.30 Editing vertical text 151
- Figure 66: Text 154
- 7.33 Splitting text segments 155
- Composite fonts 156
- A. Master 159
- B. Font property 159
- C. Design axis 159
- 7.35 PDF font substitution 160
- 7.38 Editing forms 162
- 7.39 Editing PDF2Go documents 164
- Acrobat 165
- 8. Global Changes 167
- Flip the page content 169
- Rotate the page content 169
- 8.5 Adding text 174
- 9.1 About Action Lists 176
- 9.2 Action types 178
- 9.3 Running an Action List 178
- Creating or editing an Action 179
- Using the Enfocus Navigator 179
- 9.5 Locking an Action List 185
- 9.6 Action Lists in practice 185
- Page boxes 187
- 9.7 Using QuickRuns 188
- 9.8 Further automation 190
- 10. Color management 191
- 10.4 Rendering intents 193
- Perceptual remapping 194
- Saturation remapping 194
- 10.5 Using spot colors 197
- To create spot colors 198
- To apply a spot color 198
- To edit spot colors 198
- To remap spot colors 198
- To duplicate a spot color 198
- 10.6 Using ICC profiles 200
- 10.8 Color conversion 203
- 11. Overprint 207
- Color spaces 210
- Enfocus PitStop Pro 226
- (continued) 229
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