passages.id: split_4_test_2043_passage
passages.type: progene_text
passages.text: The present study aims at comparing dimensional alteration , superficial texture and compression resistance of stone dies submitted to different disinfection methods : 30-minute immersion in 1 % sodium hypochlorite or in 2.2 % alkaline glutaraldehyde ( with or without previous ultrasonic washing ) and addition of 2.2 % alkaline glutaraldehyde or 5 % sodium hypochlorite to the gypsum during its preparation .