material must also be compatible with and dispersible throughout the enamel and the coloring material preferably resists deterioration in the engine environment in which the braided sheathing is eventually put to use stability of the enamel and its chrome appearance are preferably enhanced by adding stabilizers to the enamel a uv stabilizer is desirable to prevent any degradation of the enamel or the resulting chrome color in uv light such a stabilizer can be a uv light absorber such as a hindered amine operating as a free radical scavenger and preferentially absorbing uv light and dispersing it as harmless energy a heat stabilizer can be in the form of a hindered phenolic anti oxidant that stabilizes polymers against thermal oxidative degradation such stabilizers are generally known and are preferably used in tiny amounts that do not affect the desired chrome appearance of the enameled wire the amount of the coloring material used in the enamel is important to produce a chrome appearance too little coloring material leaves the wire appearing beige mauve and silverish and too much blue coloring material makes the wire appear blue if the right amount of blue coloring material is used though the wire will not appear blue but will have a chrome appearance this apparently results from the effect of the indiscernible blue coloring material on the light reflected from the enamel and silver surfaces of the wire a similar balance is needed if the less preferred black coloring material is substituted for blue coloring material to approximate a chrome appearance too little coloring material leaves.