And for 1 litres oil you need around 2.5 kgs of dried pumpkin seeds. From these seeds without any shell, which are a natural food and which are processed to a dark green oil, which looks a litte bit red, when the light is shining through.
Pumpkin seed oil (Kernöl or Kürbiskernöl in German, bučno olje in Slovenian, bučino ulje or bundevino ulje in Serbian and Croatian, and tökmag-olaj in Hungarian), a culinary specialty of south eastern Austria (Styria), eastern Slovenia (Styria and Prekmurje), north western Croatia (esp. Međimurje), adjacent regions of Hungary, is a European Union Protected Designation of Origin (PDO) product.