text: The oxidizers can be boron ( III ) oxide , silicon ( IV ) oxide , chromium ( III ) oxide , manganese ( IV ) oxide , iron ( III ) oxide , iron ( II , III ) oxide , copper ( II ) oxide , and lead ( II , III , IV ) oxide and others .
simplified: Some metal oxides that can be used are copper ( II ) oxide , chromium ( III ) oxide , iron ( II , III ) oxide , manganese ( IV ) oxide , silicon dioxide , boron trioxide , or lead ( II , IV ) oxide .