Sažetak
Nowadays, all kinds of industries are facing surging prices and uncertainty about the supply of natural raw materials, which are closely related to their shortage. The paper industry and therefore, the graphic industry is facing the same problem. The graphic industry supports all economic activities with its products, whether it is information, news, entertainment, education, advertising or packaging, so it can be said that printed products play a major role in daily life. Today, the packaging sector is rapidly developing and growing and the graphic and paper industry play an important role in the production and design of packaging. Therefore, it is necessary to expand the sources of raw materials for the production of packaging, especially to annually available renewable sources. Considering the fact that packaging becomes waste very quickly after using the product it protects, from the moment of production until delivery to the consumer, the goal is to produce reusable packaging in an environmentally safe way without endangering the consumer or the product. Not only is it desirable that the packaging could be recycled for environmental reasons, but it is also important that it is of good quality and that it can carry printed information. In this research, studied papers as one of the most common substrates for printing and widely used packaging material were made from the pulp of recycled fibers refined with 30% pulp of cereal straw of the Croatian climate. Printed laboratory-made
papers in full tone with conventional black ink by offset, flexographic printing and gravure printing were subjected to a test of chemical resistance to water. Given that, packaging most often comes into contact with water during transportation, storage and handling,
recommendations for choosing the optimal printing technique when printing paper with straw pulp will be based on the tested water resistance of the prints.
Ključne riječi
straw pulp water resistance packaging prints printing techniques
