Yazar "Yenidoğan, Semiha" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    EFFECT OF USING CALCIUM CARBONATE (CaCO3) IN SURFACE COATING ON LIQUID ABSORPTION OF PAPER AND SOME PRINTABILITY PARAMETERS
    (Editura Acad Romane, 2020) Kandırmaz, Emine Arman; Yenidoğan, Semiha; Aydemir, Cem; Karademir, Arif
    For quality printing results that require detail, the smooth paper surface, absorbency, color and gloss are of great importance. Since the desired surface properties cannot be obtained even in well-polished paper, smooth paper surfaces can be obtained by sizing and coating processes. The aim of this study was to investigate the effect of different amounts of calcium carbonate, added into the surface coating formulation, on liquid absorbency and printability of paper. Paper coating formulations were created by adding 1%, 2.5%, 5% and 7.5% calcium carbonate to an equal amount of cationic starch binder. The obtained coating formulations were applied to the surface of standard pieces of paper with a lab coater. Water absorbency and drop contact angle of all papers (base paper and surface-treated paper) were measured by using the sessile droplet method and then their surface energies were calculated. After the gloss and color changes of the test papers were determined, test prints were applied on their surface with offset printing ink. The effect of surface treatments on the printability characteristics of the paper was examined in detail. It was emphasized that the amount of calcium carbonate used in cationic starch should be optimized with regard to the absorbency and printability of the paper.
  • Küçük Resim Yok
    Öğe
    Statutory Obligations Incurred by Occupational Health and Safety Law in Printing Industry and Press Sector
    ([TR] Akademik Bilişim Araştırmaları Derneği, 2019) Yenidoğan, Semiha; Çırakoğlu, Sevil
    Printing industry is a sector requiring extensive examination in terms of occupational health and safety due to being a line of work having hazardous chemical used therein, requiring transport of heavy loads, having intensive electrical energy, and having movable cylinder and sharp objects use. The fact that negative conditions containing risky activities in terms of human health are present in the printing industry and press sector increases the importance of occupational health and safety. According to Annex-1 in the Notification of Workplace Hazard Classes Relating to Occupational Health and Safety published in the Official Gazette dated 26.12.2012, it is within the class of hazardous workplace. Thus, occupational health and safety in the printing industry and press sector worth and required an extensive evaluation. In this article, evaluation of printing industry and press sector in terms of occupational health and safety was carried out and statutory obligation was examined. Firstly, general features of the printing industry and press sector were briefly mentioned, afterwards works and risks, occupational accidents and occupational diseases in the printing industry and press sector were handled with various dimensions thereof. The sector was evaluated with its dimension of occupational health and safety thereof.