In an attempt to counteract the yellowing, some printers will add a small amount of opaque optical whitener to the varnish that will be applied over white paper, but it is a less than perfect solution. And for some reason, silk, dull and matte coated papers tend to reveal yellowed varnish much more than their gloss-coated counterparts. Yellowing is not a big concern when the varnish is used over process colors, but it is noticeable when the varnish is applied over unprinted paper, especially today's high-brightness blue-white papers. One problem is that over time, they tend to yellow.
In addition to providing relatively little protection, varnishes have other drawbacks too. Although varnishes must be handled carefully to prevent the release of harmful volatile organic compounds into the atmosphere, when dry they are odorless and inert.
Varnish can either be flooded across the entire sheet or spot applied precisely where desired, to add extra gloss to photos, for example, or to protect black backgrounds. Varnishes are applied just like an ink, using one of the units on the press. Varnishes offer a relatively low degree of protection compared to other coatings and laminates, but they are used widely, thanks to their low cost, flexibility and ease of application. Varnish coatings are available in gloss, satin or dull finishes, with or without tints. Three major types of coatings are used: Varnish Coating They provide light to medium protection at a relatively low cost. Liquid coatings are by far the most common way to protect print publications. Coatings are also used on magazine and report covers and on other publications that are subject to rough or frequent handling. Areas that are heavily covered with black ink or other dark colors often receive a protective coating to guard against fingerprints, which stand out against a dark background. Different coatings are available in different finishes, tints, textures and thicknesses, which may be used to adjust the level of protection or achieve different visual effects. Other coatings, including aqueous coatings, are usually flooded across the entire sheet. Some coatings, such as varnish, can be spot applied to a precise point or points on the page such as just to the photos, for example. Liquid coatings can be applied in-line by the printer as part of the printing process or off-line after the project leaves the press. And clients may not ask about them at all. Aside from using a varnish to highlight a photo, designers often give little thought to the use of protective coatings or laminates. While a great deal of thought may have gone into a project for the printing press, much less attention has been paid to preserving the artwork after it leaves the printer. Whether it's applied by a printer or a finisher, the right protective coating or laminate can keep your printing project looking professional.Įven though protection may be necessary on a marketing piece it is often overlooked. Paper Coatings - UV, Aqueous and Varnish Coatings Used in Commercial Printing
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Testimonials Payment Methods Free Professional File Checking Services Free Proofs of Your Art Files - Paper Coating Types. Summit Printing, we’re taking every step possible-in accordance with government guidelines-to keep employees safe and customers satisfied as we continue with operations. Now that the covid vaccines are available we don't anticipate any future disruptions. Since Commerial Printing is considered an Essential Business, all of our locations are operating, and orders are shipping on time.