Abstract: The thin-skinned Korla pear and the hard-skinned mangosteen were used as materials. To explore the effects of fruit properties and infrared pulsed laser parameters on the marking effect and fruit storage quality, the influences of fruit peel water content, fruit peel hardness and laser marking speed on the color, line width and continuity of laser labels were analyzed. And the local morphology, labeling stability and decay of fruit peel marked with optimal processing parameters during storage period were investigated. The results showed that both the water content and hardness of the fruit peel and the laser marking speed had significant influences on the marking effect of thin-skinned and hard-skinned fruits. Besides, the laser labels manifested superior stability during storage with storage quality basically unaffected. It provides a certain reference for exploring the influence of the individual differences of the same kind of fruit and the properties of different kinds of fruit on the laser marking effect.
Key words: fruit peel; laser marking; fruit peel water content; hardness; storage quality