Abstract: The rose petals were dried by hot-air drying to obtain the pressed flower materials.The influences of temperature or drying time on the drying characteristics,artistic beauty of rose petals were studied.Micromorphology of rose petals was characterized by SEM.The drying dynamic model was established by statistical analysis and the dynamic parameters were also calculated.The results showed that in the temperature range of experimental design,the rose petals drying rate was increased with the increasing of temperature or drying time.However,the higher temperature or longer drying time was not useful to improve the artistic beauty of rose petals.The artistic beauty of rose petals can be obtained under the drying condition of temperature 45 ℃,840 min.Connect modeling coefficients of the hot air drying was 2.524×10^-10 m²/s.Activation energy was 11.322 kJ/mol.The thin layer drying page model was suitable for describing the drying process of pressed rose petals by hot-air drying.

Key words: rose petals, pressed flower, drying dynamic model, hot-air drying