The bitumen content varies from 83% to 92% (soluble in carbon disulphide), with a penetration value near to zero and a softening point (ring and ball) around 120 °C.
ðə bɪtˈuːmɛn kˈɑːntɛnt vˈɛɹiz fɹʌm ˈeɪɾi θɹˈiː pɚsˈɛnt tə nˈaɪnti tˈuː pɚsˈɛnt sˈɑːljuːbəl ɪn kˈɑːɹbən dˈaɪsəlfˌaɪd, wɪð ɐ pˌɛnɪtɹˈeɪʃən vˈæljuː nˌɪɹ tə zˈiəɹoʊ ænd ɐ sˈɔfənɪŋ pˈɔɪnt ɹˈɪŋ ænd bˈɔːl ɚɹˈaʊnd wˈʌnhˈʌndɹɪd twˈɛnti dᵻɡɹˈiːz sˈiː.