The French Navy instead developed the Slow Burning Cocoa (SBC) powder, which had grains of about ; still only 40% of it burned, the rest was ejected as heavy black smoke.
ðə fɹˈɛntʃ nˈeɪvi ɪnstˈɛd dɪvˈɛləpt ðə slˈoʊ bˈɜːnɪŋ kˈoʊkoʊ ˌɛsbˌiːsˈiː pˈaʊdɚ, wˌɪtʃ hæd ɡɹˈeɪnz ʌv ɐbˈaʊt ; stˈɪl ˈoʊnli fˈoːɹɾi pɚsˈɛnt ʌv ɪt bˈɜːnd, ðə ɹˈɛst wʌz ɪdʒˈɛktᵻd æz hˈɛvi blˈæk smˈoʊk.