폐잉크를 이용한 스크린인쇄용 블랙잉크 제조에 관한 연구

Abstract

Abstract The solvent inks such as Toluene, Cyclohexanon, and Xylene are usually used to clean the printing plate of screen printing. Yet, this work usually leads many inconveniences such as headache of worker by smell of solvent, and complaints due to wastewater. If you use water-based inks, you can work more comfortably due to less strong smell and easy cleaning by water. However, a water-based ink has not commonly been used, since there have been no cases and applications of screen paper printing by water-based inks. In order to reduce the inconvenience of solvent ink, I adopted a textile water printing which is a kind of water-based ink to screen printing. As a result, the strong smell and wastewater has been reduced so that overall working environment is improved. I examined printability of solvent ink by using textile water ink such as Cyan, Magenta, Yellow, and Black. In this study, I have used a waste ink after inkjet printing instead of Black textile water ink. There are domestic and imported inks existed in current inkjet printing market. Most of inkjet printer use water-based ink except heating solvent type; a heating solvent type machines cannot use a water-based ink due to clogging of the nozzle. In addition, most of expiration dates of these inks don’t exceed more than 3-6 months. The ink which is left by sealed more than 6 months, it clogs head nozzle of machine due to precipitation and coagulation. In addition, if you stop printing about 3-4 hours in the middle of printing work, the head nozzles of printer could be naturally clogged. To prevent of this situation, worker should implement Cleaning and checking head nozzle before hands. When the nozzle is clogged in the middle of work, running a head cleaning mode can clear the clogged nozzle. Yet, large amount of waste inks which are passed clogged nozzle will be remained after cleaning. It would be very nice that ink companies take the waste ink back by green marketing, but none of them are doing it currently. Cyan, Magenta, Yellow, Black, Light Cyan and Light Magenta, these six inks of ink jet print are changed to waste inks. I wonder whether these waste inks can be a Black ink for screen printing or not. If wasted ink could be recycled, it can reduce cost and pollution. From this assumption, I have started my research. The purpose of this research is that making a Black water-based recycle ink by waste inks which are left of nozzle clogging or passed expiration date. This recycle ink will improved working environment and reduce cost of disposing waste inks. Furthermore, it is very environment friendly and economical. The price of the Black ink is 8,000won per 1kg, but the cost of using recycle ink is only 1,000won per 1kg- it consists 192won of thickener and 1,192won of binder. The recycled black ink is absolutely more cost efficiency than using commercial black ink, if you consider not only price of ink but cost of disposing waste. It is called a recycle ink which is water-based black ink made by waste inks.