The initial pre-cleaning begins with the removal of large and small impurities. Then it is followed by processing in the fine cleaners and screen graders. In order to remove undernourished and weak seeds, we use an indent cylinder block that separates the seeds based on their length and removes short, broken or unthreshed seeds. We clean the heavier impurities with a stone separator. Even if you have pebbles, soil or glass impurities with the same size as the seeds, the stone separator will recognize them because of their different weight and will separate them. The gravity separator, which Grain Processing EOOD uses in seed preparation, has a similar function. Unlike the stone separator, it recognizes lighter impurities and is suitable for removing seeds eaten from the inside that do not germinate, thus separating them from quality seeds. The finest sieving and sorting of excellent seeds is done by an optical colour sorting machine, whose high-tech optics can distinguish imperfections on the surface of the seeds so that it separates the ones of the highest quality.