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Article

Effect of the Common Solvents on UV-Modified Photopolymer and EPDM Flexographic Printing Plates and Printed Ink Films

1
Faculty of Graphic Arts, University of Zagreb, Getaldićeva 2, 10000 Zagreb, Croatia
2
Faculty of Natural Science and Engineering, University of Ljubljana, Aškerčeva cesta 12, SI-1000 Ljubljana, Slovenia
*
Authors to whom correspondence should be addressed.
Coatings 2020, 10(2), 136; https://doi.org/10.3390/coatings10020136
Received: 10 December 2019 / Revised: 30 January 2020 / Accepted: 1 February 2020 / Published: 4 February 2020
The aim of this research was to analyze the influence of the solvents commonly used in flexography on photopolymer and ethylene propylene diene monomer (EPDM) flexographic printing plates and prints. EPDM plates are recommended when the reproduction process includes a higher amount of the solvents or aggressive solvents. Since additional UV treatment of flexographic printing plates could decrease the interaction between the plate and solvent, photopolymer and EPDM plates were treated with varied UV radiation and exposed to different types of solvents. Effects of the UV treatment and of the solvents on printing plate properties and on prints were analyzed. Results show that EPDM plates are more resistant to solvents in terms of the degree of swelling; however, surface properties of the plates were affected for both plate materials. In addition, the degree of swelling and increased hardness due to UV radiation were crucial for changes of the width of printed lines, and altered surface free energy affected the thickness of deposited ink film for both plate materials. Therefore, depending on the qualitative requirements of specific printed film, the duration of UV treatment can be adjusted for use with specific types of printing plate and solvent. View Full-Text
Keywords: flexography; photopolymer; EPDM; UV treatment; swelling; surface free energy; line width; ink film thickness flexography; photopolymer; EPDM; UV treatment; swelling; surface free energy; line width; ink film thickness
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MDPI and ACS Style

Tomašegović, T.; Mahović Poljaček, S.; Strižić Jakovljević, M.; Urbas, R. Effect of the Common Solvents on UV-Modified Photopolymer and EPDM Flexographic Printing Plates and Printed Ink Films. Coatings 2020, 10, 136. https://doi.org/10.3390/coatings10020136

AMA Style

Tomašegović T, Mahović Poljaček S, Strižić Jakovljević M, Urbas R. Effect of the Common Solvents on UV-Modified Photopolymer and EPDM Flexographic Printing Plates and Printed Ink Films. Coatings. 2020; 10(2):136. https://doi.org/10.3390/coatings10020136

Chicago/Turabian Style

Tomašegović, Tamara, Sanja Mahović Poljaček, Maja Strižić Jakovljević, and Raša Urbas. 2020. "Effect of the Common Solvents on UV-Modified Photopolymer and EPDM Flexographic Printing Plates and Printed Ink Films" Coatings 10, no. 2: 136. https://doi.org/10.3390/coatings10020136

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