As　shown　for　the　system　in　study,　the　eutectic　Pt-C,　the　conditions　in　terms　of　the　impurity　content　on　the　one　hand　and　the　heat-input　rate　on　the　other,　are　such　that　melting　is　triggered　invariably　at　the　inside　of　the　ingot,　even　though　heat　is　injected　from　its　outside.　But　under　current　conditions　melting　from　the　outside　will　start　sometime　during　the　melting　process,　resulting　in　＂Two-front＂　melting,　covering　the　main　part　of　the　process.　The　effects　of　＂Inside　melting　only＂,　＂Outside　melting　only＂　and　＂Two-front　melting＂　on　the　relation　between　the　melting　curve　T-cav(t),　as　measured,　and　the　melting　profile　T-m(x),　associated　with　the　impurity　profile,　embedded　in　the　ingot　during　the　preceding　freeze,　will　be　analyzed　in　a　one-dimensional　diagrammatic　representation.　Any　of　the　melting　characteristics,　measured,　or　modelled,　are　described　by　an　effective　Scheil　function,　where　the　differences　between　the　Scheil　parameters　are　considered　indicative　of　the　effects,　searched　for.