Step 1: You will need....
Sodium Hydroxide (lye)You can use "Red Devil" drain cleaner or buy it on eBay.
Luminol, also available on eBay.
Hydrogen Peroxide (3% drugstore variety)
Sodium Ferrocyanide, also known as tetrasodium hexacyanoferrate or sodium hexacyanoferrate (II), is
(of course) also available on eBay.
Container to mix in. DO NOT USE METAL!!! They may react with the sodium hydroxide. Especially aluminium.
Generally this in non toxic, but that isn't an excuse for abuse!
Step 2: Solution A:
2. When thoroughly mixed & dissolved, pour some of this solution in a small (50 ml) beaker and add 0.1 grams of Luminol. Luminol is difficult to dissolve so to help, tilt the small beaker to one side so the Luminol powder sinks to one side. With a glass rod or popsicle stick, keep smashing the Luminol powder until it all goes into solution.
3. When the Luminol is finally dissolved, pour the contents of the small beaker into the rest of the Sodium Hydroxide solution. This is your completed 'Solution A'.