Before a print job commences, a commercial printer undertakes a series of steps to insure the files received from a client will print properly when the job goes to press. This period of preparation is referred to as pre-press. Hence, when inquiring about the status of a print order, your printer may say it’s about to go into or is still in the pre-press phase of production.
What is Pre-Flight?
Depending on the nature of the print job, a commercial printer may require a client to submit the original files (typically referred to as the “native” files) generated by the graphic software program used to create the project. In other instances, a printer will supply and require pre-formatted templates be used to submit a job. In either instance, the submitted file will go through a process called pre-flighting. The pre-flight process examines the file and determines whether it has been set-up properly and contains all the components necessary for the job to print. Common issues that arise when a job goes to press are examined: are images saved at the necessary resolution? Are colors defined and designated as CMYK (for full-color jobs)? Does the job require the use of a spot color ink, varnish or coating? Are bleeds set-up properly? Are proper margins maintained or does text overlap in an area where it may become illegible when the document is trimmed?
Most commercial printers use specialized software that answer these questions in pre-flight and can flag problematic issues on the spot. In fact, many commercial printers incorporate this software in their websites and during the file submission process, it will automatically flag problems when a file is uploaded to the server. Or, if a file immediately passes muster, the software will generate a PDF proof enabling the client to give the go-ahead for production. It’s important to note, issues with grammar or spelling are not flagged in the pre-flight process.
Generating Proofs
After the pre-flight process has been completed, as mentioned above and discussed in a previous post, a proof of the document or piece will be generated which the client must approve before the job will be cleared to go to press.
Digital or Offset Press?
Once a proof has been authenticated by the client and permission has been granted to print the job, another step may occur in the pre-press realm depending upon whether or not a digital or offset press will be used for the print production. If a digital printing press is used, the pre-flighted file can be sent directly to the press. However, if an offset press is used, printing plates (thin sheets of aluminum or other metal) need to be created. Traditionally, these plates were created using a photographic process. In today’s digital world, printers use devices that use laser technology to etch the plate directly from a digital file.
If you have any questions about pre-press, give us a call at 330-597-8560. We’re happy to help you get the most out of your printing project.
