the use of an osmotic solution during sonication influenced the chroma and hue of the strawberries(Fig.1b). increasing sucrose concentration in the osmotic solution has increased the chroma value and decreased sinificantly the hue.both changesare positive for the strawberry final colour, because the use of the osmotic solution has produced a more reddish fruit with a more vivid colour in freeze-dried strawberries. the hue of the strawberries treated for 10 min subjected to ultrasound and immersed in a 50% w/w sucrose solution presented a value ranging from 8 to 10, which represents an almost pure red colour (h=0).