Why does the ink stink?

What you smell is actually ink. If the ink is left for a long time, the smell will fade away, and you will smell the original smell of the ink. Because animal viscose sol is used as emulsion glue and animal glue and gum are used to produce ink, it is necessary to add some spices, but the content should be moderate. Too much will reduce the composition of coal and glue, and too little will not achieve the effect.

The ink produced by this method has a short storage time and is sensitive to temperature. The viscosity of ink varies greatly at high and low temperatures, and it is easy to produce gel at low temperatures. It can only be used normally after heating.

But also easy to be oxidized and deteriorated, and the storage is not durable. After storage for a certain period of time, it will become acidic, and protein will produce insoluble reaction under acidity, which will lead to decomposition, detachment and sinking of substances. The ink produced by organic animal glue and gum is easy to produce unpleasant smell and stickiness when writing.

Extended data:

The main raw materials of ink are soot, rubber, additives and solutions, which are generally machined. There are many kinds of soot, including various mineral plants and animal raw materials, which are formed by combustion or thermal decomposition.

In addition to animal glue, vegetable gum (Arabic gum) or various synthetic gums such as acrylic gum and polyol resin are also used as glue. Additives include various stabilizers, penetrants, wetting agents, preservatives, essences, etc.

Modern ink-making methods are similar to traditional ink-making methods since Ming and Qing Dynasties, but the cigarettes and drugs used are not as elegant as those in Ming and Qing Dynasties, so the quality of ink is not as good as that in Gu Mo. In order to cater to the purchasing power of the public, we take more raw materials that are easy to buy in the market and use mechanical stirring and kneading.

The most commonly used cigarettes are industrial lampblack from the burning of heavy oil extracted from petroleum, vegetable oil used for lamp cigarettes and mineral lampblack, which are properly mixed according to categories and grades. Glue is mostly mixed with additives, such as cow glue, fish glue, Arabic glue, or chemically synthesized plastic and acrylic glue.

Camphor, borneol, preservative, mildew inhibitor, chemical fragrance, synthetic fragrance, etc. Usually it is added. Otherwise, the so-called "green ink" has blue color, which is due to the addition of cyanine pigment. The so-called "tea ink" has a brown luster, which is caused by adding limonite pigment.

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