Today I heard from a friend that Eumakers, a well-known filament company is located in my town. I contacted them and the manager met me in their warehouse. There i saw the production line of the filament, from the pellets to a string, that is then wound on a spool automatically, then stored in vacuum bags and in cardboard boxes, ready for shipping in EU and Overseas!
They also gave me some samples of their newest materials and some of their reusable spools in order to make a workshop DIY lamp. Here are some Photos of the parts and the lamp itself.