The effect of enriching blood with Fe(OH)3 is actually unprofessional, and it is estimated that it is an amateur "fortune teller" practice. Because Fe(OH)3 is insoluble in water, it will produce a granular effect when making blood effects, and even large particles may condense into a "block" paste. Although it is not easy to see when shooting with a camera, it can be found by careful observation with the naked eye.

The professional configuration of blood is sodium thiocyanate and ferric chloride. However, sodium thiocyanate is toxic and a controlled chemical, so it is not easy to buy, so it may be a helpless move to replace it with Fe(OH)3.

Ionic reaction of sodium thiocyanate with ferric chloride;

Fe3+ + 6SCN-===[Fe(SCN)6]3-

Complexation reaction, the product is red.