æt hˈaɪ hˈiːt, lˈɪθiəm ˈɑːksaɪd ɪmˈɪts ɐ vˈɛɹi dɪtˈɛktəbəl spˈɛktɹəl pˈætɚn, wˌɪtʃ ɪŋkɹˈiːsᵻz ɪn ɪntˈɛnsᵻɾi ɐlˈɔŋ wɪð dᵻɡɹɐdˈeɪʃən ʌvðə kˈoʊɾɪŋ.
At high heat, lithium oxide emits a very detectable spectral pattern, which increases in intensity along with degradation of the coating.