Pre-treatment is particularly important for walnuts, as the irregular shape of the walnut makes it difficult to slide inside the press. Walnuts must be coarsely chopped before processing - roughly to the size of a peanut. Too much breakage should be avoided as this will force the oil press to clog. It is also advisable to dry the walnuts before processing. This is done either in the oven with the oven door open (60 - 80 °C for approx. 2 hours) to allow the moisture to escape. However, an automatic dehydrator is ideal (at 50 °C for 4 to 8 hours). Long-term drying (spread out on a cotton cloth or on baking paper) on domestic radiators for several days is also possible. It is also important that pressing should take place shortly before pre-drying, as otherwise the raw material will draw moisture from the surrounding air again.
OP 700 - The appliance clogs when pressing walnuts. What can I do?
