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Presentations 2015, 2016

iarigai Toronto 2016
iarigai, VIGC, IS&T at drupa 2016

iarigai VIGC, Brussels
Evolutions in food packaging printing

You are here: Conferences & Events * 2010 Montreal * Abstracts * 4. Innovative use of printing

4. Innovative use of printing

4.07 Production of colored nanocrystalline cellulose (NCC) films

Christine Canet, Alice Vermeulin, Fyrial Ghozayel, Jean-David LeBreux, Yasser Kadiri, Gilles Picard, Dominique Simon

The Quebec Institute of Graphic Communications (QIGC) has been conducting a three-years R&D project aiming at developing a liquid printing material made of nanocrystalline cellulose and its print applications. Among the vast area of promising applications NCC might offer, QIGC has decided to focus on developing a liquid printing material made of NCC in order to introduce security elements like latent patterns and/or specific colors in a print. Color produced by thin NCC films is not due to the presence of pigmented element, but results from light interferences on NCC self-organized as a Bragg network. Counterfeiting of such an “ink” will thus be seriously compromised.

This project comprises several steps, among which: 1/ The identification and understanding of parameters controlling the color of a thin NCC solid film; 2/ The characterization and mapping of the whole range of reproducible colors; 3/ The formulation of a printing material made of NCC and 4/ The development and establishment of a procedure to obtain predictable and consistent target colors.

The present paper aims to present used methodology. It also highlights achieved results-to-date and describes future steps and main issues to overcome to complete successfully this project.

Keywords: nanocrystal, color, new generation ink, nancrystalline cellulose films
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4.08 Paper-Supported Assay for the Quantification of Alkaline Phosphatase Activity

Scott Williams, Lindsay Cade, Daniel Clark

A current medical diagnostic assay for alkaline phosphatase (ALKPHOS, ALP) was adapted to a paper support in order to determine whether a clinically relevant (30 to 202 IU/L) enzyme activity level could be both detected and differentiated.  Bioactive paper developments have received significant attention in recent months due to exciting new developments in paper-supported assay platforms and methodologies.  We conducted our experiments in order to determine whether a clinically established and certified clinical assay could be directly translated to a paper-supported platform, and return results that are accurate and sensitive enough to be visually quantitative. We also wanted to explore how paper properties, such as permeability might affect the efficacy of such an assay and how differing paper properties might facilitate the use of clinical diagnostics to a point-of-care location. Reaction time course and time-limited ALPase concentration assays were done and it was found that the reaction time course extended over a much longer time than anticipated, and optimizing the reaction time was critical in the development of a useful protocol. We also demonstrated that low alkaline phosphatase activity levels are detectable and may be differentiated using optical instrumentation, but cannot easily be visually resolved.  Both physical and structural paper properties were found to influence the rate of enzyme reactions.

Keywords: paper-supported assay, bioactive paper, enzyme kinetics
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4.09 Printing of identification characters on vanishing micro-pattern of plasticized polymers as the means of polygraphic protection

Akakiy Dzhvarsheishvili, Alexandr Kondratov, Evgeny Bablyuk

In this paper we propose a unique method of protecting information, which is based on the process of swelling of the polymer material. The development objective is to create a technology when a printed image, containing the informative component, protected against forgery, for instance, a bar-code, is applied on a polymer base surface, enabling its duplication in numbers of copies with no high technological costs and impossibility of adulteration. The protection from adulteration is provided by using a specially selected couple of materials for the production of sealable material and refining solvent, providing a rapid and significant increase of surface layer’s volume, where the informative mark is disposed on.

Keywords: swelling, polymer, protection, screen printing
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