This program aims to develop the metrology to enable quantitative understanding of, and the development of standards, in quality and reliability controls in manufacturing of graphic arts substrates, such as cellulosic paper based on digital, automated processes. This project describes the efforts to be performed at NIST, in joint research with the United States Government Publishing Office (GPO).
Paper is a complex, heterogeneous, multi-phased material. While there is a significant body of work related to the dielectric properties of cellulose, comparatively fewer studies have been done on printing and writing grades of paper. In our previous work, we have been able to differentiate between papers of containing a variety of wood and non-wood fiber species via resonant cavity dielectric spectroscopy as well as several other attributes, including recycled fiber content.
Through those investigations we have determined that while dielectric properties largely depend upon the anisotropy and the fiber species content of the sheet, the presence of additives, such as inorganic fillers (ash content), organic colorants and optical brightening agents (OBAs), and the percentage of recycled fiber, also affect the observed dielectric loss of a sample. In this effort, we will probe the underlying mechanisms that drive these variables to influence dielectric and optical behavior of printing substrates.
Our competencies include, but not limited to, spectroscopy (optical, microwave, and X-ray micro-diffraction, etc.), electrochemistry, as well as semiconductor process integration knowledge.
The projects within this program include the characterization and understanding of the nature / composition of graphic arts substrates (e.g., paper) and their application packaging. The developed metrology and documentary standards we develop will aid advanced manufacturing, document security and commercialization of advanced complex integrated systems. Towards this end, the following are some of the current projects within the program: