I ordered MICR toner powder and want to make a ferromagnetic fluid and keep it in a bottle. -First I need to make the ferrofluid. I mix MICR toner with vegetable oil (or oleic acid) or kerosene. Which of the two should I use? What's the difference? -I will put the ferrofluid in water. On YouTube I saw a video in which someone used 70% ethanol/30% water. Doesn't the oil of the ferrofluid solve in ethanol? -How can I prevent stains from the ferrofluid on the glass of the bottle? -Can I use iron powder to make the ferrofluid? I hope someone can help me. I don't want to mess it up.