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Digital Glossing, Its Applications and Performance Evaluation

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In Graphic Arts industry, the surface treatment of glossing provides two major functions to the printed sheets. The first is to accentuate the piece giving it more emphasis and the second is to serve as a protecting layer against damage to the information underneath. The common practice of glossing involves both in-line and off-line processes of aqueous, varnish, Ultra Violet (UV) and lamination. Aqueous and varnish could be applied in-line using one of the inking units of an offset press. UV could be applied through a build-in device that's part of the offset press or an offline UV applicator. Aqueous and UV could be done real-time but varnish has to be applied after the printed ink is dry completely, usually overnight. Lamination is an off-line process adhering a layer of glossy thin film material on top of the entire printed sheet to deliver high gloss if so desired and this is gloss lamination. When a layer of matte film is applied to the printed sheet it will give a matte appearance instead of glossy and it's known as matte lamination. Both solid and liquid films are available for lamination processes. The gloss lamination could achieve a gloss level of 80 (G20) or higher.

Several attempts were made by the digital printing industry to increase the overall gloss level of electro-photographic prints. They include both in-line and off-line processes. The results were mixed. Gloss lamination and UV coating remain as the two major methods to provide high gloss for electro-photographic prints.1 A novel method to deliver high gloss on these prints is being reported in this article.2 This approach utilizes a belt in fusing a layer of Clear DryInk overcoat on top of a printed sheet to achieve a high level of gloss. It also makes use of barcodes and barcode-scanner to communicate the machine parameters between the digital press and the glossing unit hence an optimized system level near-line solution. Several substrates were tested using this method in comparison to aqueous, varnish, UV and lamination. The achieved gloss level and protection performance were reported in this study.
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Document Type: Research Article

Publication date: 2005-01-01

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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