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home > Tips & Tutorials > Prepress >Proofing Process with Blueline Proofs
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BLUELINES / BLUEPRINTS - Bluelines are inexpensive, photographic proofs from negatives where all the colors are presented in blue (although blue isn't always the color), and usually used for spot color jobs. These Blueline negatives are used for the printing plates that are to be exposed to a photosensitive paper to produce the image to be printed. The reason for using bluelines are to check for the accuracy and position before final plates are created. Some other names used for bluelines are position proofs, dyelines, blueprints, brownlines, whiteprints, blackprints, and silverprints, contact proofs, position only proofs, salt proofs, diazo prints, etc.
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BluePrints - Wikipedia - A history and explanation of Blueprints.
Who Needs the Blues? - Many publishers, in their RFQ, ask for a full set of blue lines. As we don't make blues as a matter of course, we charge for them. Many kinds of publications do not really need blue lines, and time and money can be saved without them.
Reviewing Proofs - Bluelines, color proofs, and press checks give you and your Coordinator several checkpoints in the printing process to make sure that the project will print to your expectations. Each one of these checkpoints, however, involves slightly different things to watch for, as explained here.
Blueline Proofs - To print book bodies, we create film negatives that are used to make the metal plates which are, in turn, used on the printing press. These same film negatives are used to produce blueline proofs.
Reviewing a Blueline Proof - What should you look for when reviewing the blueline.
Blueline and Laser Proof Guide - Here is a guide to help you with reviewing your first bluelines.
Proofs - Any printed product output using electronic media requires a proof. There are so many variables when it comes to electronic media that even small projects like letterhead and envelopes can have unexpected errors.
The Fine Art of Color Proofing - Previous articles in this series about printing have discussed the basics of prepaid card production and the design process. Part III covers the importance of the proofing process.
In The Loop - What is a Proof - It is important to look carefully at each of the proofs associated with your print job. We've all heard stories about how mysterious things appear (or disappear) between one proof and the next. It happens to the best of us.
Proofs: A Crib Sheet - When you receive a proof from the printer, you've reached the final step in the printing prepress process. At this critical stage, what you see in the proof is exactly what you will see in the publication. Your responsibility is to establish that the proof is accurate.
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