Formulation of green printing ink for ceramic subtrate

Kamrul Zaman, Nur Najwa Aqilah (2017) Formulation of green printing ink for ceramic subtrate. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

In this research, waste cooking oil is used as the binder. The pigments for the ink was carbon black powders which resulted in black colored ink. The functional group of the ink was characterized by FTIR and was compared with the commercial ink that uses petroleum-based binders. The FTIR spectra of the ink was recognizably similar to the commercial ink due to the oil having the same functional groups as the commercial inks. Silk screen printing technique was used to print the ink onto the ceramic substrate. To ensure that the ink is suitable for the printing technique, a viscosity of more than 1000 centi Poise (cP) is needed. However, in this project, the viscosity of the ink was not achievable due to some difficulties when adding starch as the thickener to the ink. The viscosity of the ink in this research remained at 200 cP. For printing evaluation, the UTeM logo image had been chosen to be printed on the ceramic substrate. For visual observation of the printed substrate, it was observed that the ink could not retain the image on the substrate. This was due to the low viscosity of the ink resulting in high dispersion of the ink. The low surface roughness of the substrate also contributes to the dispersion of the ink on the substrate. To confirm the properties of the printed ink on the ceramic substrate, adhesion test was conducted. After the adhesion test, the peeling and flaking of the ink from the substrate was observed under an optical microscope. It was observed that most area of the printed ink sticks on the substrate and only peeling occurred at the areas where external force was applied.

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