After the end of the Second World War, advertisements have noticeably blossomed along with the progress of Japanese economy. Towards the end of 20th century, advertisements have become a mirror to reflect the era and left its footprints greatly in the history of Arts and Culture. As we are now in the 21st century, the transition of the media has changed the purpose and the role of advertisements. By showing you my earlier era’s noticeable advertisements as examples, I would like to reminds you the height of prosperity of the advertisements.

The Contribution of this society to the international activity in photographic science is described on the occasion of its 90^th anniversary. The contribution was mainly made to the activity of The International Congress of Photographic Science (ICPS), which was founded in 1889 and held nearly every 4 years. Presenting a report for the first time at ICPS in 1935, this society became to organize the 20th ICPS in 1967 in Tokyo. Subsequently enhancing its contribution to ICPS, and co-organizing all the Inetrnational East-West Symposium from 1984 to 2004, this society became to act in the center of the international activity of photographic science.

Nuclear photographic materials are entering the era of on-demand design that optimizes for each research purpose. In this design, it is desirable to discriminate latent images of large silver nuclei and sub-latent images of small nuclei, and to improve S/N ratio of the track detection. In this report, the authors would review technologies of lith-development, nucleating-development and selecting-development, which are methods of forming ultrahigh contrast images in plate-making photographic materials for printing. On the basis of ultrahigh contrast technologies, we will discuss the improvement of S/N ratio in detection of ionizing radiation tracks.

The results in the previous paper [T. Tani, T. Uchida, Jpn. J. Appl. Phys., 54, 065001 (2015)] have revealed that gelatin has an ability to protect Ag nanoparticles from oxidation by keeping its Fermi level higher than that of the particles. In this paper, it has been indicated from experimental results that the Fermi level of surroundings of the grains is determined by active gases coming from air, and that components from air are repeatedly adsorbed and desorbed, forming their layer with limited thickness on the grain. The titration of aqueous solutions have revealed strong buffer activity of gelatin, which prevents the particles from being sharply influenced by the change in ambient condition.