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Understanding the Proofing Process in Printing: A Comprehensive Guide

This guide by Randy Thompson, Director of Business Development at PROOFSPurpose, explores the vital proofing process in printing. It emphasizes the importance of communication with customers, documentation of changes, and financial protection. The document outlines various proof specifications, including customer details, file identification, and the types of proofs available. It compares digital proofing methods such as low-resolution laser and high-resolution thermal imaging, discussing their advantages and limitations. Essential proofing tips and the emerging direct-to-plate technology are also covered.

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Understanding the Proofing Process in Printing: A Comprehensive Guide

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  1. Basics of Printing Understanding the Proofing Process Randy Thompson Director, Business Development

  2. PROOFSPurpose • Opens communications • Keeps customer in the loop • Allows you to document changes for added billing • Limits financial exposure

  3. Proof Specifications • Name / Address / Contact of Approver • Date of Proof • File Identification (Job Name) • Type of Proof • Purpose – Text only, color only, contract • Approval or Change Documentation • Customer Signature Area

  4. Digital Proofs • Created directly from computer digital files • Same files used to create plates • Variety of digital proofing systems running from low resolution to high end, high resolution halftone dot reproduction • Replacing analog proofing systems

  5. Digital Proof Imaging

  6. Digital Proofs - Low Res Color Laser Printer • Small Format limitations • Toner Inks • New generation with RIP software for proofing short run variable data full color jobs

  7. Digital Proofs - High Res Digital Sublimation • Dye Sub • First system on market • Uses dyes and heat to create image • Quick and inexpensive • Laser Sub • Dot based proof • Equal quality to analog proofs • Current standard for digital contract proof

  8. Digital Proofs - High Res Laser Thermal Imaging • Halftone dot image • Fastest growing system • Internal RIP that images plates as well • Closest to printed piece

  9. Digital ProofsFactors to Consider • Dots vs No Dots • Inability to accurately judge overprinting • Spot Colors reproduced in full color build • Advantage • Less than half the cost of analog proofing and produced in less time

  10. Digital Proofs PDF/Soft Proof • RGB image of art transmitted by E-Mail or FTP site access • Advantages • For non color critical jobs • Check for content and position • Disadvantages • RGB vs CYMK

  11. PROOF TYPES PRESS CHECK • Actual press sheet when make-ready completed • Checked for: • Registration • Color Density • Color match to approved proofs

  12. Proofing Tips • Correct Size and 100% • Exact Registration • Plus or minus one-half row of dots • Use printer’s loope • Check for scratches, dirt or any marks in text, solids, screens • Check text. Line up laser proof, Typeface • Check all images for color, clarity and sharpness

  13. Direct to Plate Technology • Start with electronic art • CD-Rom/DVD/FTP • Pre-flight electronic art • Image a low-res paper proof for position • Image a hi-res proof for color approval • Take same electronic art and image plate • Take plates to press and do make-ready • Print job

  14. Direct To Press Technology • Start with electronic art • Pre-flight electronic art • Make low-res proof for position • Make hi-res proof for color approval • Take same electronic art and image to a printing plate directly on press already in perfect registration already • Print Job

  15. Heidelberg DI Press with internally mounted polyester print plates

  16. Recap • Film vs Digital systems • Soft (on line) proofing for simple jobs • Contract proofs • Digital proofing on the rise • Proofing type vs nature of job / process • Press checks

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