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. 2021 Nov 13;28(2):252–256. doi: 10.1016/j.jiac.2021.11.006

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© 2021 Japanese Society of Chemotherapy and The Japanese Association for Infectious Diseases. Published by Elsevier Ltd. All rights reserved.

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 1 — Surface shape observation and complete drying time analysis. (A) Appearance of plain paper (PP), inkjet paper (IP), and inkjet photo paper (IPP). (B) The surface shapes of PP, IP, and IPP were observed using an optical microscope (VHX-7000, Keyence, Osaka, Japan). (C) The three-dimensional surface shapes of PP, IP, and IPP were observed using an optical microscope (VHX-7000, Keyence, Osaka, Japan) and a laser scanning microscope (VK-9510, Keyence). (D) Time required for 2 μL of Dulbecco's modified Eagle's medium on the surface of each paper (PP, IP, and IPP) to completely dry (complete drying time).