Abstract: A feeding assembly (10) for machines (M) treating multicolor endless wire-like elements (21) is disclosed, comprising a frame (11) supporting a bobbin (12) on which the wire-like element (21) is wound, a driving unit (13) for the bobbin (12) to cause rotation of the wire-like element (21) around its longitudinal axis (X) and a detection unit (14) of the rotation of the wire-like element (21) around its axis (X). The detection unit is arranged downstream of the bobbin (12) and emits as an output (14a) a logic signal. A central unit (15) operatively connected to the detection unit (14) acquires and processes the logic signal and controls the driving unit (13). The detection unit (14) comprises an optical detector (30) with adjustable sensitivity for reading one of the colors.

Abstract: A method of making a multicolor product (1, 11; 22, 23) with longitudinal development of precious material adapted to be used for manufacturing wearable ornamental articles such as armlets, necklaces, and the like is disclosed comprising the following steps: providing a coated wire (3) consisting of a central element (4, 17) of precious metal material covered by one or more external coaxial sheaths (5,18; 19), each of said sheaths being obtained by helical winding of a covering wire (5a) made of precious material of a different color relative to the color of the material of the central element (4, 17); manufacturing an unfinished product (7, 15, 21) with longitudinal development using the coated wire (3) on which one or more mechanical workings are carried out; removing material from one or more zones (10) of the unfinished product (7, 15, 21) for a depth sufficient to make visible one or more of the underlying materials of different colors constituting the sheaths of the coated wire (3).

Abstract: A method of making a multicolor product (1, 11; 22) with longitudinal development of precious material adapted to be used for manufacturing wearable ornamental articles such as armlets, necklaces, and the like is disclosed comprising the following steps: providing one or more coated wires (3) each consisting of a central element (4, 17) of precious metallic material covered by one or more coaxial external twisted sheaths (5,18; 19) also made of precious metallic materials having different colors from each other and relative to the color of the material of the central element (4, 17); manufacturing an unfinished product (7, 15, 21) with longitudinal development using at last one of the coated wires (3) on which one or more mechanical workings are carried out; removing material from one or more zones (10) of the unfinished product (7, 15, 21) for a depth sufficient to make visible one or more of the underlying materials of different colors constituting one or more sheaths of each of the coated wires (3).