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  • [ X ]
    Öğe
    Preparation of Ecofriendly Offset Printing Ink Varnish with Safflower Oil and Pinus pinaster Resin and Printability
    (2020) Hayta, Pelin Hayta; Oktav, Mehmet; Duru, Ozlem Ates; Ozomay, Zafer
    Offset printing inks are composed of four main components including colorants, binders, solvents and additives. When these components are examined, it is seen that they contain petrochemical substances. During and after the printing process, some of these components are separated from the ink as waste material and are mixed with air, water or soil, thus damaging nature and human beings. Considering this problem, safflower oil and natural (Pinus pinaster) resin were used in this study to produce bio based offset printing ink varnish, one of the main components of the ink. Safflower oil and (Pinus pinaster) resin were mixed in different proportions to form varnish with suitable viscosity to the printing ink composition. The usability of these varnishes as an alternative for varnishes produced with mineral oil in standard offset printing ink was investigated. Magenta color standard offset printing ink was prepared with these varnishes and sample prints were printed on coated paper, uncoated paper, Bristol board with IGT C1 offset printability tester. Test prints were examined in terms of specialties such as drying, L*a*b and density with a spectrophotometer. As a result of the measurements and determinations, it was determined that the varnish produced with safflower oil and (Pinus pinaster) resin can be used instead of offset printing ink varnishes produced with mineral oil.
  • [ X ]
    Öğe
    Production of environmentally friendly printing ink varnish using Pinus brutia resin and sunflower oil and determination of printability parameters
    (Emerald Group Publishing Ltd, 2026) Hayta, Pelin; Oktav, Mehmet; Akgul, Ahmet; Ozomay, Zafer
    PurposeThis study aims to investigate the usability of Pinus brutia resin and sunflower oil in printing ink varnish. The areas where Pinus brutia forests are located in Turkey are the most suitable forests for pine resin production due to the topography and climatic conditions. For this reason, another aim of the study is to determine the usability of Pinus brutia resin, a sustainable resource that has not been tried in printing inks before, in ink.Design/methodology/approachForty grams of sunflower oil and 70 g Pinus brutia resin were used as varnish components. Offset printing ink was prepared by formulating 80% varnish, 17% cyan pigment and 3% dryer. The prepared varnish was tested in the eco-friendly offset printing ink formulation.FindingsRheological and optical analyses were performed to test the varnish. Viscosity, tack and rub resistance tests were performed for rheological analysis; and L*a*b*, gloss and light fastness tests were performed for optical analysis. Rheological tests showed that the varnish can be used in offset printing ink formulation. Printability tests confirmed that the varnish can work in ink.Originality/valueThe originality of this study is the production of varnish from the combination of natural Pinus brutia resin and natural sunflower oil and demonstration of varnish workability in ink. The varnish thus produced is completely natural. Pinus brutia resin grown in Turkey has been tested for the first time in printing ink and has been successful. On the other hand, it has been determined that the resin obtained from Pinus brutia tree is a natural and sustainable raw material that can be used in ink varnish without damaging the ecosystem.
  • [ X ]
    Öğe
    Yenilenebilir maddelerle hazırlanan cyan renk ofset baskı mürekkebinin basılabilirlik analizleri
    (2022) Hayta, Pelin Hayta; Oktav, Mehmet; Ozomay, Zafer; Duru, Ozlem Ates
    Ofset baskı mürekkepleri içeriğinde yer alan hammaddeler genellikle petrokimyasal maddelerdir. Mürekkep bileşeninde bağlayıcı, çözücü ve katkı maddesi olarak yer alan petrokimyasal maddelerin bazıları baskı esnasında ve sonrasında mürekkep filminden ayrılırlar. Havaya, suya ve toprağa karışabilen bu maddeler insan sağlığı ve çevre için zararlı olabilmektedir. Bu kapsamda çalışmada; iki tür ofset baskı mürekkebi hazırlanmıştır. Mürekkep 1 Aspir yağı ve Pinus pinaster (sahil çamı) reçinesi ile mürekkep 2 mineral yağ ve Pinus pinaster reçinesi kullanılarak formüle edilmiştir. Mürekkeplerin farklı tür kağıtlar üzerine ofset baskı tekniğiyle test baskıları yapılmıştır. Baskıları yapılan kağıtların baskı anı ve mürekkep kuruması sonrası renk ölçümleri yapılarak ofset baskı tekniğine uygunluğu incelenmiştir. Ayrıca piyasada kullanılan standart bir cyan renk ofset baskı mürekkebi doğal bileşenlerle hazırlanan iki mürekkeple birlikte analiz edilerek karşılaştırma yapılmıştır. Çalışmanın sonuçlarında görülmüştür ki; kuruma sonrasında Mürekkep 1 ile baskısı yapılmış olan kağıtlardan uluslararası standartlara göre en iyi sonucu veren Bristol karton olmuştur. Bristol karton ΔE=6,6136 ve densite=1,2 değerlerinde ölçülmüştür. Mat kuşe kâğıt ΔE=10,94 ve densite=1,14 değerleriyle bu mürekkeple baskı uygunluğu en düşük kağıt olmuştur. Tüm analizlerin sonucunda doğal bileşenlerin mürekkep içeriğinde kullanılabileceği fakat nihai standart üretim için bileşenlerin oranlarının değiştirilerek standart değerlerle eş değer sonuçların elde edilebileceği gözlemlenmiştir.