Coating On Cards
Adding an outside layer to your postcards or business cards can do a lot of things to make better the appearance, feel, and overall look of your printed work. First, a covering will guard the ink from scuffing and advance the overall durability of your design. Second, in terms of satisfying the receiver, a covering will make a flat appearance and feel. Lastly, external layers, especially if they are spot covering, will draw the reader's concentration to particular areas, adding deepness and knowledge to your printed design. Below are the most accepted types of coatings used in most of the print shops in the country.
Varnish is a petroleum-based variation of printing ink. It will normally emerge on a printing press as normal ink and applied in-line. Ink, paper type, and category of varnish must all be considered when choosing on the varnish result you are trying to attain. A gloss varnish will strengthen colors on your postcard or business card, while a matte glaze has a more impartial result. Of all the coatings, varnish is the most elastic, given that they perhaps used on any paper stock, uncoated or coated, together with text weights, and applied over ink with no fear of bleeding. Varnishes applied on uncoated stock give rub protection, but very negligible visual effect. Varnishes dry slower than UV coatings.
UV Coating is a very high shine, clear liquid apply to the printed-paper exterior and dried on press with ultraviolet rays. A key advantage of UV coatings is that it is leader in sheen and rubbing resistance. UV coated portions are also forage and chemical defiant, as long as a self-protective wall against wear and tear by exhibit, handling and use.
Other benefits of UV coatings are little VOC and the full, rapid drying. The limitations of UV coatings are the health dangers in using uncured coating, poor bond to some inks, and costly waste clearance issues.
Aqueous Coating (AQ) is a water-based, fast-drying, defensive coating that is applied in order on a printing press to give a more low-priced coated product. This coating make a printed piece that is opposed to fingerprints, scuffs and rubs and it is longer than common varnishes. Aqueous coating has the benefit over varnish due to its instant drying. It can be applied over damp ink and close up the printed sheet, drying without delay. It will also decrease treatment time for cutting and other post processes. As it is water-based, it has the drawback of paper curl, mostly on thinner papers. In addition, certain pigments may bleed with aqueous.
Varnish vs. UV vs. Aqueous
1. Rub Resistance - U.V. coatings give the most excellent results for run resistance. However, aqueous coatings also offer good rub resistance. Traditional overprint varnishes are often customized for precise requirements but, an improvement in rub resistance is often resulting in a decrease in gloss.
2. Yellowing - Varnishes will tend to yellow with age. Both water based and U.V. coatings are non-yellowing.
3. Cost - A thought of raw material costs would show UV coatings to be more expensive than overprint varnishes and water based coatings. Water based coatings are often the most inexpensive since they are applied in-line keep away from double handling.
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