Offset printing. The paper is 180-kg wood-free paper. Around the time I made this card, I made some works for my Peeping series. For the layout and my own sentiments, I wanted to use the three cats Kyoku, Kuro, and Hachitaro.
The drypoint etching work used on the back side (Hachi and Kuro) is from my Peeping series. The stamp part is a rat silhouette.