Hard Proof
Hard proof is also called hard-copy proofing. It is a digitally printed inkjet sample that is used for checking the job before commencing the entire print run. The actual job is printed on an offset press. Hard proof is only used to check the colour and the content. It is a set of the page by page colour printing proofs that will not be bound like the final product. The hard proof will show up any issues with images, logos, and text that may be a problem. It is not produced on the same paper that is used for the final print run. It is also not used to show any binding or finishing processes. We recommend that clients use a dummy for checking paper and binding quality.
How Do We Produce Hard Proof?
Hard proof is produced by our Epson inkjet digital proofing machines. These use the GMG colour-proof system to control the hard-proof colour.
The Epson proof is calibrated to international standards to match offset litho presses. The calibration is checked regularly to ensure the highest standards of colour control are maintained. The GMG color-proof system reproduces colour with 95% accuracy. Offset litho presses are run to tight colour control standards and the GMG proofing system is fingerprinted to match these characteristics.
The pdf files used are the same as for the final print run. They are passed through a different colour control system to accurately replicate the press colours.
Why Do We Do Hard Proof?
Hard proof is a cost-effective method of checking the print job before commencing the normal print run. The colour calibration means it is much more accurate than a pdf check on a screen. It is also much easier to check text, logos, and images on hard proof than a PDF.
The hard proof is produced before any printing plates are made for the normal printing run. This means a customer can check the job and make any necessary corrections at this stage. It can save the client extra expense as it is a relatively cheap proofing option. If colour accuracy is an important factor for the print job, a hard copy is very useful.
Hard proof is set up to produce accurate colour representation on standard coated papers. Therefore the color may change slightly on the press when printing on certain uncoated or coloured paper stocks and boards. It is important to understand what the hard proof is for and its limitations. Many jobs these days are produced just using soft proof (pdf proof). The pdf will show all the information on the job but is not accurate for colour. This is fine for a print job such as giving away flyers for example where colour isn’t critical.
If the printing job contains important special colours an offset printed sample may be required. This is also the case if using uncoated or specialist stock.
The budget and expectations of each job need to be considered when choosing hard proofing.
Hard Proofing vs Normal Printing
Hard proof is a content and colour-checking device. The digital files used are the same that are used for the final printing on the offset press. They are processed via the same RIP and therefore can be guaranteed to be accurate. The normal print run is produced on the actual paper stock.
Hard proof is produced on a digital inkjet proofing machine on standard digital printing paper. This paper is specially produced in order to be calibrated to accurately reproduce offset litho colours. Normal printing uses different inks; commonly cyan, magenta, yellow and black plus special Pantone colours and others. Normal printing is also produced on a wide range of papers and boards with differing weights and finishes.
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