About KIUCHI MASATO
About (独) 国立印刷局
About 日本印刷学会誌
About security
About figure
About decoration
About geometry
About technical history
About engraving machine
About money
About printed matter
About prevention
About action and behavior
About 幾何学模様
About falsification
About falsification protection
About 斜紋
About pattern
About Printing technology in general
About セキュリティ
About デザイン
About 歴史
About 幾何学
About 模様