What surface was suitable for printing? Plastic, metal, glass, ceramics, cloth, timber, leather all passed the test and sometimes could be made to glow in the dark as well.
「細活」非得「慢工」出？實驗室裡，一種種能接著於紙、塑膠、金屬、玻璃、陶瓷、布料、木材、皮革… … 的印墨，陸續被開發出來，印墨裡，還成功地加入了香料與磷光劑，使產品能因應所需，適時發出香味或成為夜間反光標幟。