(Note: Be certain to read caution below.) Here is one way; lemon juice can be used as a simple invisible ink. (Don't use too much!) When it dries, it can't be seen, but applying heat from a low-wattage light bulb later to the paper and ink will turn the "ink" a visible brown.
Warning: DO NOT use fire, heaters, or anything else hot enough to turn the paper itself brown; you could cause a fire resulting in damage, injury, or death. and it could burn down your house too.
1.take ink out of a pen
2.mix vinegar with ink
3.melt wala
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(Note: Be certain to read caution below.) Here is one way; lemon juice can be used as a simple invisible ink. (Don't use too much!) When it dries, it can't be seen, but applying heat from a low-wattage light bulb later to the paper and ink will turn the "ink" a visible brown.
Warning: DO NOT use fire, heaters, or anything else hot enough to turn the paper itself brown; you could cause a fire resulting in damage, injury, or death. and it could burn down your house too.
1.take ink out of a pen
2.mix vinegar with ink
3.melt wala
Find a source of carbon. Completely charred charcoal (un-burned charcoal contains wood chips and sawdust), wood or bone will do. If you have hurricane or oil lamps, harvest the lampblack with a brush. Ashes from burned charcoal and wood will contribute potash, a substance that helps bind your ink.
Pulverize the carbon in a stone or porcelain dish, using a ceramic or metal pestal. You should end up with a very fine dust that leaves a light coating when blown off the surface of a piece of paper. Place the dust in a ceramic or other hard-surfaced, non-metallic bowl.
Add a bit of distilled water and stir your ink until it forms a consistent wash. You can also use denatured alcohol or vinegar to liquefy your ink. Water will evaporate more slowly than alcohol or vinegar and give you more time to perfect your solution. More carbon will produce a blacker ink and less will produce a lighter ink. Since you can dilute ink when you are ready to use it, keep your solution as thick as possible as you mix it.
Use a touch of sieved shellac or ground shellac flakes as a carrier for your ink so that it can be loaded onto a brush or pen. If you've used charred pine wood, your carbon dust will already contain some resin that will act as a binder. The Chinese used Gelatin, which dries very slowly compared to shellac. Gum Arabic, which has the added advantage of being water soluble, can also be used.
Store your India ink in an airtight bottle or let it dry into cakes to use with calligraphy or artist's brushes. Ink will get stale due to the organic nature of the carriers, so use your liquid ink within a month or so of the date in which you make it. Dry and cake ink tends to last longer. Store-bought ink has preservatives to prolong the life of the ink.
For the love of God...you don't! Pen ink is toxic, and is not the same as tattoo "ink". The word "ink" is a misnomer. Tattoo ink is made up of non-toxic pigment. You'd be better off using India Ink if you must go the broke route.