Photochromic and fluorescent ink using photoluminescent strontium aluminate pigment and screen printing towards anticounterfeiting documents.

Luminescence : the Journal of Biological and Chemical Luminescence
Marwa M AbdelhameedTawfik A Khattab

Abstract

Novel inorganic-organic hybrid photochromic and fluorescent ink for anticounterfeiting documents was developed using a pigment/resin ink formula enclosing a long-lived luminescent inorganic pigment with good thermal photostability. The produced ink exhibited an optimal excitation wavelength at 360 nm with an absorption colour and fluorescence changes in the printed document. To develop a transparent printed film from pigment/resin ink, the phosphorescent pigment has to be well dispersed physically without agglomeration. The pigment/resin hybrid was applied effectively onto commercial cellulose paper sheets using screen-printing technology. An homogeneous photochromic layer was deposited on cellulose paper document surface to afford a considerable greenish-yellow colour as demonstrated by CIE coloration measurements under a UV lamp, even at a pigment concentration as low as 0.1 wt% of the ink formulation. The printed paper sheets exhibited three excitation bands at 235, 274 and 378 nm and three emission bands at 416, 418 and 436 nm. Fluorescence optical microscopy, Fourier-transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and wavelength-dispersive X-ray fluorescence spectrometry...Continue Reading

References

Jan 1, 2004·Chemistry & Biology·Ipsita Roy, Munishwar Nath Gupta
Jul 30, 2011·Advanced Materials·Yujun SongXiaogang Qu
Apr 2, 2015·Luminescence : the Journal of Biological and Chemical Luminescence·Naoya AdachiMasafumi Sugeno
Apr 8, 2015·Luminescence : the Journal of Biological and Chemical Luminescence·Renjie WangShouzhi Pu
Feb 27, 2016·Luminescence : the Journal of Biological and Chemical Luminescence·Piyush Jha
Oct 6, 2016·ACS Applied Materials & Interfaces·Tânia V PintoCristina Freire
Sep 5, 2018·Carbohydrate Polymers·Tawfik A KhattabSamir Kamel
Dec 7, 2018·ACS Applied Materials & Interfaces·Akhilesh Kumar SinghBipin Kumar Gupta
Mar 1, 2019·ACS Applied Materials & Interfaces·Alex Julià-LópezClaudio Roscini
Dec 20, 2019·Luminescence : the Journal of Biological and Chemical Luminescence·Tawfik A KhattabSamir Kamel
Jan 1, 2020·Carbohydrate Polymers·Tawfik A KhattabAhmed A Allam
Aug 18, 2020·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Ekta RaiShyam Bahadur Rai

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Citations

Jul 9, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Ahmed S Radwan, Mohamed M Makhlouf
Jul 27, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Ahmed HameedNashwa El-Metwaly
Jul 30, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Ali AldalbahiMokarram Hossain
Jul 30, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Omnia M MokhtarTawfik A Khattab
Aug 29, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Mehrez E El-NaggarMokarram Hossain
Sep 23, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Mohamed H El-NewehyMehrez E El-Naggar
Oct 30, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Mohamed H El-NewehyMehrez E El-Naggar

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