The major cause of paper deterioration is the acid-catalyzed hydrolysis of the cellulose in paper fibres. The deacidification of paper reduced the rate of this deterioration, and it has been reported to extend the useful life of acidic paper by three to five times. It has been recognized the need for an effective method of deacidifying large quantities of books and documents. T도 review of the current state of deacidification technology has been published recently. The paper points to the immediate need for a cost-effective and reliable method to save the millions of books that prish every year. It was tried to deacidify by the gaseous ethanolamine for solving with the above the problem. Acidic paper was treated with the monoethanolamine, diethanolamine, triehtanolamine. It result, it was found that the rate of deacidification was in caused very little grightness and fold endurances. For solving this problem, it was carried with deacidify by combination treatment of the various gaseous ehtnaloamines. In result, decreasing of brightness and fold endurance is reduced.