Copresco   Overnight Lite

Choose the right paper for your project...

Differences Between Coated and Uncoated Papers

   What’s the best paper choice for printing your books, sales pieces or technical publications: coated or uncoated?

Coated Paper

   Strictly speaking, coated papers are those containing a mixture of pigments (such as clay or calcium carbonate) and binding agents (like starch and latex) that have been applied to the surface during the papermaking process.
   The purpose of this coating is to help fill in the peaks and valleys of the paper to provide a smooth, flat printing surface.

Multiple Options

   All coated papers fall roughly into four categories: matte, dull, silk (which is less common) and gloss.
   The difference between the four is supercalendering, the process of passing the newly coated paper through a series of rapidly rotating stainless steel rollers to polish the paper’s surface.

Matte or Gloss

   Simply put, matte finish papers are coated, but not supercalendered; gloss finish papers are. Dull finish papers are very lightly supercalendered.
   Matte and dull finish papers have, as the name implies, a relatively dull surface. Silk coated paper is a low gloss sheet with a smooth surface and silky feel.

Gloss Finish

   Gloss finish papers have a shiny surface. Glossy is sometimes used to refer to all coated papers. This term is a misnomer and should be avoided.

Important Considerations

   Following are a few more points to ponder when specifying a coated paper stock.

Remember When...

Uncoated Paper

   Many Copresco clients prefer uncoated papers for their digitally printed projects.
   Uncoated sheets—available in a wide selection of colors and finishes— offer a warmer, more natural look and feel than coated stocks. The nonglare surface provides effortless reading.

Client Preferences

   Copresco clients most frequently specify 50# and 60# uncoated offset papers.
   Overnight Lite is printed on an uncoated paper that gives us vibrant colors with crisp blacks for our photos and cartoons as well as laser-sharp text.
   The 70# sheet meets postal regulations for the self-mailing piece.
   Our TechTopics technical bulletins are printed on a 65# uncoated cover stock. This sturdy sheet provides the rigidity needed for three-hole drilling and the included tab divider.

Thickness and Weight

   Another fact of which you must be aware is that coated papers are heavier than uncoated paper stocks.
   For example, a 100# gloss sheet has the same thickness as a 60# uncoated sheet, but has 67% more weight.

Mix Them Up

   You can gain the benefits of both types of paper by printing sections of your project with photos and graphics on a coated stock and placing these sections between the regular text “chapters” of your publication.
   Unlike conventional printing’s rigid confinement to signatures, digital printing gives you the freedom to mix and match to your heart’s content.
   You can place your photos and illustrations exactly in the right spots with your text pages.


   Finally, remember that neither coated nor uncoated book paper is “better.” The “better” paper is the one best suited to the task at hand.

Expert Help a Call Away

   Copresco’s production staff has extensive knowledge about paper and will help you make the right choice for your project. We can give you printed samples on different papers to help you make the right decision.
   So, don’t delay. Call the digital ondemand printing leader today.
   Call Copresco.

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