How will I know if I run out of invisible ink ???

Answer 1

your invisible friend will tell you

Answer 2

When you realise, like the little girl with the naked king, that there is no ink.

Ink is a liquid, or sometimes a paste or powder, consisting of a pigment or a dye, used for writing, drawing or printing on paper and other materials. A pigment is a material that changes the color of light it reflects as the result of selective color absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which the material itself emits light.

Many materials selectively absorb certain wavelengths of light. Materials that humans have chosen and developed for use as pigments usually have special properties that make them ideal for coloring other materials. A pigment must have a high tinting strength relative to the materials it colors. It must be stable in solid form at ambient temperatures.

For industrial applications, as well as in the arts, permanence and stability are desirable properties. Pigments that are not permanent are called fugitive. Fugitive pigments fade over time, or with exposure to light, while some eventually blacken.

Pigments are used for coloring paint, ink, plastic, fabric, cosmetics, food and other materials. Most pigments used in manufacturing and the visual arts are dry colourants, usually ground into a fine powder. This powder is added to a vehicle (or matrix), a relatively neutral or colorless material that acts as a binder.

A distinction is usually made between a pigment, which is insoluble in the vehicle, and a dye, which is either a liquid, or is soluble in its vehicle. A colorant can be both a pigment and a dye depending on the vehicle it is used in. In some cases, a pigment can be manufactured from a dye by precipitating a soluble dye with a metallic salt. The resulting pigment is called a lake pigment.

A dye can generally be described as a colored substance that has an affinity to the substrate to which it is being applied. The dye is generally applied in an aqueous solution, and may require a mordant to improve the fastness of the dye on the fiber.

Both dyes and pigments appear to be colored because they absorb some wavelengths of light preferentially. In contrast with a dye, a pigment generally is insoluble, and has no affinity for the substrate. Some dyes can be precipitated with an inert salt to produce a lake pigment.

Archaeological evidence shows that, particularly in India and the Middle East, dyeing has been carried out for over 5000 years. The dyes were obtained from animal, vegetable or mineral origin, with no or very little processing. By far the greatest source of dyes has been from the plant kingdom, notably roots, berries, bark, leaves and wood, but only a few have ever been used on a commercial scale.

Remember, invisible is not the same as transparent. Transparent substances do not reflect color, yet reflects light, while invisible reflects nothing, like dark matter. We only conjecture that it exists.

So, invivible ink is not ink as an invisible bank balance is not a healthy one.

Answer 3

Your invisible ink pen stops working.

Answer 4

You will know that you've run out of invisible ink when you notice that your hand has disappeared.

Answer 5

When the pen starts to scratch the paper because it is dry, as oppose to the ink flowing and gliding across the paper.

Answer 6

run one of those magic markers over what you've just wrote and see if anything come up. if nothing shows then you've ren out of invisible ink.

Answer 7

how would you even know you have an invisible ink?!

Answer 8

when your writing with invisible ink you know it, you can tell if youv'e run out because you don't know anymore

Answer 9

Your invisible friends will tell you.

Answer 10

Drop coloured liquid into the ink and see how it flow.