"C1" "C2" "C3" "C4" "C1" "C2" "C3" "C4" "Carbon" "Sand" "Fiber" "Addition" "Addition" "Casting" "Wet-Mold" "(%)" "(%)" "Hardness" "Strength" "0" "0" "61" "34" "0" "0" "63" "16" "15" "0" "67" "36" "15" "0" "69" "19" "30" "0" "65" "28" "30" "0" "74" "17" "0" "0.25" "69" "49" "0" "0.25" "69" "48" "15" "0.25" "69" "43" "15" "0.25" "74" "29" "30" "0.25" "74" "31" "30" "0.25" "72" "24" "0" "0.5" "67" "55" "0" "0.5" "69" "60" "15" "0.5" "69" "45" "15" "0.5" "74" "43" "30" "0.5" "74" "22" "30" "0.5" "74" "48"