The 45^th iarigai Conference took place in Warsaw, Poland, from October 3^rd to 7^th 2018 at Warsaw University of Technology, Department of Printing Technologies, hosted by Prof. Georgij Petriaszwili as conference director and Prof. Zuzanna Żołek-Tryznowska as co-director. The conference was co-located with the 50^th annual conference of the International Circle (IC); both conferences were to contribute to the celebration of the 50^th anniversary of the Department of Printing Technologies.

The scientific program of the iarigai conference consisted of 24 papers from 15 countries, organized in 6 sessions: Print and User Interaction; Graphic Design; Substrate and Materials; Printing Processes and Products; Print Quality and Printed Functionality. The conference was frequented by 42 registered participants from 20 countries. Our hosts made all of them feel very comfortable during the Conference days. All five iarigai honorary members were guests at the conference.

The keynote speakers at the jubilee session on the last day of the conference came from industrial partners such as Heidelberg and from the Polish Printing Industry Association.

The prize for the best paper and presentation was granted to Mr. Mustafa Bilgin and Prof. Dr.-Ing. Johannes Backhaus from University of Wuppertal, Germany for their paper “Development of a Unidirectional Switchable Photochromic Ink for Smart Packaging”. It was handed over during the official jubilee session on the last conference day.

The conference closure took place at the great main building of the University of Technology, where, in the evening, the gala dinner with ceremonial programme followed by a ball for ca. 600 guests was organized.

An optional social programme was offered on the next day (Sunday). The sightseeing guided tour led through the famous baroque residence castle of King Jan III and the Copernicus Science Centre.