Uploaded September 2018 | Updated September 2026, 4 hours ago
The blood red color comes from thiocyanatoiron ions. The skin was rubbed with a paper towel soaked with a solution of thiocyanate ions, and the knife was covered with a solution of iron(III) ions, which has a light yellowish color. When the solutions are combine, these ions react together to form blood red [Fe(SCN)]2+ ions, reproducing the effects seen in movies such as Terminator, Predator, Braveheart and many more.
The blood red color comes from thiocyanatoiron ions. The skin was rubbed with a paper towel soaked with a solution of thiocyanate ions, and the knife was covered with a solution of iron(III) ions, which has a light yellowish color. When the solutions are combine, these ions react together to form blood red [Fe(SCN)]2+ ions, reproducing the effects seen in movies such as Terminator, Predator, Braveheart and many more.
