Printing: From pixels to paper, printing is where ideas become reality

Printing processes

Every printing process transfers ink in a different way. Some use raised image areas, others engraved cells, flat plates, screens or digital imaging systems. Each method offers unique advantages depending on run length, image quality, substrate and production speed.

Explore the major commercial printing technologies—including offset lithography, flexography, gravure, screen printing, digital printing and inkjet—and learn why each process has become the preferred solution for specific applications, from books and catalogs to packaging and personalized communications.

Offset lithography

Offset lithography is the most widely used commercial printing process in the world, valued for its exceptional image quality, efficiency and versatility. Unlike direct printing methods, the image is first transferred from a printing plate to a rubber blanket before being applied to the paper. This “offset” process produces sharp text, smooth photographs and consistent color across long press runs.

The process is based on a simple scientific principle: oil and water don’t mix. Ink adheres to image areas on the printing plate, while water protects the non-image areas. Offset lithography is the preferred choice for magazines, brochures, annual reports, catalogs, books and many other high-quality commercial printing applications.

Sheetfed offset

Sheetfed offset uses individual sheets of paper rather than a continuous roll, offering exceptional flexibility for medium- and short-run printing. Because each sheet is handled independently, printers can use a wide variety of paper grades, sizes, textures and weights while maintaining excellent registration and image quality.

The process is widely used for premium commercial printing, including brochures, corporate communications, direct mail, annual reports, packaging and marketing materials. Its ability to deliver precise color control and superior print quality makes it the preferred choice for projects where craftsmanship and visual impact are
especially important.

Understanding sheetfed offset printing
Discover how offset printing reproduces color using ink, printing plates and the CMYK process to create consistent, high-quality printed materials.

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^{*Perfecting: Printing on both sides of a sheet or web of paper in a single pass through the press. Also applies to printing on the back of a sheet already printed on one side.}

^{**Offline finishing: The post-press processes (such as cutting, folding, binding, scoring, or die-cutting) are performed on separate, independent machines rather than directly integrated into the offset printing press itself.}

Heatset web offset

Heatset web offset is designed for high-volume production where speed and efficiency are essential. Instead of feeding individual sheets, the press prints on a continuous roll—or web—of paper moving through the press at high speed. After printing, the web passes through a heated dryer that quickly evaporates the ink solvents before the paper is cooled, folded and trimmed into finished products.

This process is ideal for magazines, catalogs, retail inserts and other long-run publications requiring exceptional image quality and rapid production. The combination of speed, automation, and consistent color makes heatset web offset one of the industry’s most productive printing technologies.

^{*Blanket-to-blanket: An offset lithographic perfecting press that has no impression cylinders. During printing, the blanket for one side acts as the impression cylinder for the other side, and vice versa. Also called perfecting press unit.}

Flexography

Flexography is a fast, versatile printing process that uses flexible relief plates and quick-drying liquid inks to print on a wide range of materials. Originally developed for packaging, today’s flexographic presses can print on paper, paperboard, films, foils, corrugated materials and pressure-sensitive labels with remarkable efficiency.

Modern flexography has evolved into one of the world’s leading packaging printing technologies. Its ability to print continuously at high speeds, combined with advances in plate technology and ink systems, makes it an excellent choice for labels, folding cartons, flexible packaging and other high-volume packaging applications.

Gravure

Gravure printing produces exceptionally rich images by transferring ink from tiny engraved cells etched into a rotating metal cylinder. The depth and size of these cells determine how much ink is transferred to the paper, allowing gravure to reproduce smooth tonal transitions, vibrant color and extraordinary detail.

Although gravure requires significant setup costs, it becomes highly economical for extremely long production runs. It is commonly used for high-volume magazines, catalogs, decorative printing, packaging and specialty applications where consistent image quality over millions of impressions is required.

Digital printing

Digital printing eliminates the need for traditional printing plates by transferring images directly from digital files to the substrate. This significantly reduces setup time, making digital presses ideal for short runs, quick turnarounds, personalized communications and print-on-demand production.

As digital technology has advanced, print quality has approached that of conventional offset printing while adding capabilities such as variable data printing, versioning and mass customization. Today, digital printing is widely used for marketing materials, books, direct mail, labels and personalized packaging. Learn more about all that is possible with digital printing in our Ed #16 Digital Possibilities and Ed # 8 Digital Variables.

Toner-based digital print technology is called electrophotography, also referred to as xerography or laser. Color electrophotography toner is made of electrically charged plastic particles, in cyan, magenta, yellow and black, that are transferred from drums to the paper and fused with heat to fix the image.

Inkjet printing

Inkjet printing creates images by precisely placing microscopic droplets of ink onto the paper without any physical contact between the printhead and the substrate. Depending on the system, droplets may be produced continuously or only when needed, allowing for remarkable accuracy and flexibility.

Today’s high-speed inkjet presses have expanded far beyond desktop printing. Industrial inkjet systems now produce books, direct mail, transactional documents, packaging, labels and commercial graphics while offering variable data capabilities and increasingly impressive image quality. As print speeds and ink technologies continue to improve, inkjet is becoming one of the fastest-growing segments of the commercial printing industry.

^{Image Permanence Institute, Rochester Institute of Technology}

Continuous Inkjet (CIJ) technology generates a continuous stream of ink droplets that are precisely controlled and directed onto the paper at very high speeds. Unused droplets are recirculated back into the system.

Drop-on-Demand (DOD) inkjet technology creates ink droplets only when and where they are needed, making the printing process highly efficient and precise. Using thermal or piezoelectric actuators, the printhead ejects microscopic droplets directly onto the paper.