Stain Resistance as Part of Image Permanence for Consumer Digital Inkjet and Thermal Imaging Systems - Part 2
Abstract:Development of a more robust procedure for quantifying unwanted staining of prints caused by accidental spills of common household beverages were presented at the 2007 IS&T Non-Impact Printing Conference. This included a review of methodologies that were currently in the literature plus the pros and cons associated with each. Results from a marketing study that identified categories of top beverages consumed worldwide were described and preliminary results assessing stain severity as a function of beverage were reviewed. Generally speaking, highly colored beverages such as coffee and red fruit punch showed higher levels of staining, and less-colored beverages such as fruit-flavored water or beer exhibited very little staining. What was not expected was the amount of staining observed with a light blue-colored sports energy drink. Although this beverage was not highly colored, the level of staining based on a visual assessment for most media ranged between 0.5 and 2 (where 0 equaled no stain and 5 equaled severe stain). This suggests that stain severity may not be solely related to highly colored beverages. Because of this finding, coupled with the stipulation that beverage brands cannot be cited within an international standard, more work was needed to understand root causes of unwanted staining. This paper will discuss studies implemented to determine whether stain severity can be correlated with factors such as what colorants are present in beverages, and/or the physical and chemical properties such as pH, viscosity, surface tension, and/or conductivity. In addition, preliminary results from a voice-of-the-customer (VOC) study will also be presented to outline what levels of staining would be considered acceptable versus unacceptable.
Document Type: Research Article
Publication date: 2008-01-01
For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.
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