Specifications: 8.8 cm long, 4.7 cm wide, 0.03 cm thick Material: Copper How long haven't you opened a paper book and read it well? I hope that bookmarking is the beginning of the collection and will lead you back into the world of reading. The iron window flower was introduced to Taiwan in about 1920. It is a folk decoration craft made from black iron as a material through a complicated process. The most common geometric pattern is a work of art that each iron window can be said to be "hand-made" by the master. But with the production of white iron windows by machinery gradually replacing iron window flowers, the production of iron window flowers has almost entered the history. In order to reproduce this beautiful window flower, metal materials-copper and etching technology are used. Now.