Patent
Printable Features Formed from Multiple Inks and Processes for Making Them
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TLDR
In this paper, reflective and non-reflective features formed from multiple inks are presented, and processes for forming these features, preferably through a direct write printing process, are also described.Abstract:
The invention relates to reflective and non-reflective features formed from multiple inks. In one embodiment, the printed feature comprises a substrate having a first region and a second region, the first and second regions having different surface characteristics; a first printed element disposed on the first region; and a second printed element disposed on the second region, wherein the first printed element is more adherent than the second printed element to the first region. In another embodiment, the printed feature comprises multiple layers formed from different inks exhibiting enhanced durability. The invention is also to processes for forming these features, preferably through a direct write printing process.read more
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References
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Journal ArticleDOI
Preparation of colloidal silver dispersions by the polyol process. Part 1—Synthesis and characterization
Pierre-Yves Silvert,Ronaldo Herrera-Urbina,Nicolas Duvauchelle,Venugopal Vijayakrishnan,Kamar Tekaia Elhsissen +4 more
TL;DR: In this article, the reduction of silver nitrate in ethylene glycol in the presence of a polymeric protective agent, namely polyvinylpyrrolidone (PVP), was used to age these dispersions at 120 °C for 1 h yields systems with average particle sizes ranging from 15 to 36 nm.
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Holograms with discontinuous metallization including alpha-numeric shapes
TL;DR: In this article, the same master hologram or diffraction grating is made into distinct authentication devices by forming replicas thereof that have different patterns of reflective material which form distinct indicia, such as a different alpha-numeric character.
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TL;DR: In this paper, a flowing aerosol is generated that includes droplets of a precursor medium dispersed in a gas phase, and at least a portion of the liquid vehicle is removed from the droplets under conditions effective to convert the precursor to the nanoparticles or the matrix.
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TL;DR: In this article, a thin film optical variable article was used in a reflection mode having a gold to green color shift with angle for currency authentication and adapted to be carried by a substantially opaque currency sheet which serves as a substrate.
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TL;DR: A metal nanoparticle composition for the fabrication of conductive features was proposed in this paper, which has a low viscosity permitting deposition of the composition by direct-write tools and a low conversion temperature permitting its conversion to an electrical feature on polymeric substrates.