MACCHINA PER LA TINTURA ECOSOSTENIBILE, CON INDACO E ALTRI COLORANTI A RIDUZIONE, DI FILATI AVVOLTI IN ROCCHE E ALTRE CONFEZIONI SIMILARI

Dyeing machine (10) for reels of yarn (S) comprising a dyeing apparatus (12) provided with a casing (14) and enclosing a dyeing compartment (16), at least one hermetically sealed closure element (18) at least one material-holder frame (20) rotatably mounted inside the dyeing compartment (16), a primary tank (24) and an auxiliary tank (26) for containing a dye bath (B), a hydraulic circuit (28) hydraulically connected to each tank (24, 26) and to the dyeing apparatus (12) in order to supply the dye bath (B) to the dyeing compartment (16) and vice versa and a plurality of support and securing means (30) for supporting and retaining the reels of yarn (S) from the inside thereof, whereby the hydraulic circuit (28) comprises means for supplying inert gas (N) and air, which are hydraulically connected to each tank (24, 26) in order to supply inert gas (N) to the dyeing compartment (16), and whereby the dyeing machine is (10) further provided with means (52) for measuring the oxygen content in the dyeing compartment (16) and with means (52) for introducing compressed air into the dyeing compartment (16).