Process for producing layers of human hair to be used in aesthetic compositions, said process comprising the steps of: - preparing a gluing solution in a vaporizer, said gluing solution being prepared in the vaporizer through stirring; - prearranging an amount of cut, washed and dried human hair; - placing on an hot press at least one first supporting sheet; - arranging the human hair onto said at least one first supporting sheet; said process being characterized in comprising the steps of: - homogeneously spraying said gluing solution, composed of 2 parts of vinyl glue per 10 parts of tepid water, onto said human hair; - covering said glued human hair with at least one second supporting sheet; - pressing for a first time in said hot press said at least one first and one second supporting sheet with the inserted human hair, said at least one first and one second supporting sheet being composed of sheets of oven paper; - turning said at least one first and one second supporting sheet with the inserted human hair over; - lifting said at least one second supporting sheet and homogeneously spraying said gluing solution onto said human hair; - covering said glued human hair with said at least one first supporting sheet; - pressing for a second time in said hot press said at least one first and one second supporting sheet with the inserted human hair; and - resting said at least one first and one second supporting sheet with the inserted human hair; and - removing said at least one first and one second supporting-sheet, obtaining said layer of human hair. - preparing a gluing solution in a vaporizer, said gluing solution being prepared in the vaporizer through stirring; - prearranging an amount of cut, washed and dried human hair; - placing on an hot press at least one first supporting sheet; - arranging the human hair onto said at least one first supporting sheet; said process being characterized in comprising the steps of: - homogeneously spraying said gluing solution, composed of 2 parts of vinyl glue per 10 parts of tepid water, onto said human hair; - covering said glued human hair with at least one second supporting sheet; - pressing for a first time in said hot press said at least one first and one second supporting sheet with the inserted human hair, said at least one first and one second supporting sheet being composed of sheets of oven paper; - turning said at least one first and one second supporting sheet with the inserted human hair over; - lifting said at least one second supporting sheet and homogeneously spraying said gluing solution onto said human hair; - covering said glued human hair with said at least one first supporting sheet; - pressing for a second time in said hot press said at least one first and one second supporting sheet with the inserted human hair; and - resting said at least one first and one second supporting sheet with the inserted human hair; and - removing said at least one first and one second supporting-sheet, obtaining said layer of human hair. - homogeneously spraying said gluing solution, composed of 2 parts of vinyl glue per 10 parts of tepid water, onto said human hair; - covering said glued human hair with at least one second supporting sheet; - pressing for a first time in said hot press said at least one first and one second supporting sheet with the inserted human hair, said at least one first and one second supporting sheet being composed of sheets of oven paper; - turning said at least one first and one second supporting sheet with the inserted human hair over; - lifting said at least one second supporting sheet and homogeneously spraying said gluing solution onto said human hair; - covering said glued human hair with said at least one first supporting sheet; - pressing for a second time in said hot press said at least one first and one second supporting sheet with the inserted human hair; and - resting said at least one first and one second supporting sheet with the inserted human hair; and - removing said at least one first and one second supporting-sheet, obtaining said layer of human hair.