Material Appraisal of Gold Paper
Gold paper printing is a high and new technology with state patent (Patent NO.ZL9822551.3)

   It is a new creation in the world : Under the joint efforts  of Chinese scientists,researchers and publishing professionals,the technology of gold paper printing came to success finally. Traditionally,gold foil is made by hands  or  machine pressing. No more than 20 m2 can be made with a gram of gold , but its physical  strengthand toughness  has been lost . It becomes fragile and easy to break,which can only be used in decoration and gilding in stead of machine color printing. In the colorful gold foil books at the present market, gold foil is just background. Words and images are printed on plastic films,but not on gold. On the contrary,the newly developed gold paper  is made  with  thchnology  of  high energy physics nanotech °£ The content of gold in a piece of 16k paper is one gram, and around 6 grams of gold are needed to make a piece of noe-gram gold paper. The status of gold in processing appears atoms,which accumulate orderly and equably under the control  of  a strong electric field . The made gold paper  is near 10,000 angstroms thick with the purity of over 99.9%. It is strong and tough with fine tissue, not losing color and with high adherence.It is humidity-proof and moth-proof.With the support of high technology,the gold paper printing technology  can  directly melt color images  on  gold paper , and keep the elegant appearance of it.It retains the characteristics of anti-oxidation, not-lsing color , humidity-proof and moth-proof . Theoretically, it can be stored for ten thousand years without worrying going moldy  or  damaged by worms.

   Sun Tzu's Art of War by Sun Tzu has been published  with  the high-tech gold paper.This kind of book is commented, by officials from UNESCO,as the fifth invention after the four ancient Chinese inventions.A certificate of State Supervision  and  Testing Center of Gold  and  Silver Products shows that the gold purity of the paper is Gold999(No.G04110340). The gold paper printed Sun Tzu's Art of War has created a new publishing era of treasured books.