Name: Formula: Other name(s) Aluminum: Al +3: Ammonium: NH 4 + Barium: Ba +2: Calcium: Ca +2: Chromium(II) Cr +2: Chromous: Chromium(III) Cr +3: Chromic: Copper(I) Cu + Cuprous: Copper(II) Cu +2: Cupric: Iron(II) Fe +2: Ferrous: Iron(III) Fe +3: Ferric: Hydrogen: H + Hydronium: H 3 O + Lead(II) Pb +2: Lithium: Li + Magnesium: Mg +2: Manganese(II) Mn +2: Manganous: Manganese(III) Mn +3: Manganic: Mercury(I) Hg 2 +2: Mercurous: Mercury(II) Hg +2
1 Make a fine paste line near your top knuckle, and let that dry. 2  Apply thick henna paste up to that line. 3  As the paste dries and bare spots open up, fill those in with more henna. 4  Leave that on for one hour or more. 5  For darker color and more even stain, scrape the paste back and reapply henna a second time.he stain may be dark as the picture at the top of the page or a deep red color, depending on your skin and the henna you use. Other techniques from history: 1  Mix the henna very thick, like pie dough, and press the thick paste onto your fingertips and fingernails.
The Longer the Better: For a very dark mehendi color, it is essential that you keep your henna on for a longer period of time. You can keep it on overnight for the darkest possible colour. When the henna dries off completely, scrape if off with a knife instead of using water.oil a few cloves and add a few garlic pods to it. Put your hands on top of this henna design and let your mehendi soak in the steam. Be careful not to burn your hands from the steam. This is also a very effective way to darken henna on hands or feet.