Oil yield and total polyphenol content in oil for each of the 16 experiments are presented in Table 2. Oil yields ranged from 48.9 to73%, which is in agreement with the obtained yield for cold expres-sion of other raw materials (Savoire et al., 2013). The maximal oilyield was obtained in trial 14. The oil polyphenol contents wereextremely dispersed (from 48 to 153 mg GAE/kg). The eight last tri-als, which correspond to the experiments with the type 1 grapeseeds, gave an oil polyphenol content approximately the doublethe eight first trials. Such oil polyphenol contents are however verylow, representing approximately between 0.013% and 0.019% of thetotal polyphenols of the seeds. These low polyphenol yields couldbe attributed to the hydrophilic nature of polyphenols responsi-ble for their low solubility in oil. Similar trends have already beenreported by Maier et al. (2009). The polyphenols remain in majorityin the seed cake (between 5 and 11 g GAE/100 g seed cake) and inthe fines (between 1 and 4 g GAE/100 g fines).As shown in Fig. 1, oil yield and oil polyphenol content werepositively correlated: oil polyphenol content was generally higherwhen oil yield was higher.Press capacity (seeds flow rate) and oil temperature during the16 expression experiments are also presented in Table 2. The presscapacity varied between 6.3 and 13.9 kg/h. The highest press capac-ities were clearly obtained with the highest screw rotation speed,