This experiment was carried out in Piracicaba, SP, Brazil. Peaches 'Aurora 1' were picked in the Paranapanema region, SP. The harvest was carried out on the 23rd October, 2000 and the fruits were treated the same day. Faultless peaches presenting 90g average mass (± 10 g) were selected. Two ripening stages were employed in this study, based on the ground color of the fruit skin: a) mature green: fruits showing intense green ground coloration and b) ripe: fruits showing green ground color alteration.