I know how the ink in gel pens are created but for scented g

I know how the ink in gel pens are created but for scented gel pens, how to they create the scent? What is the process that the pens have to go through to have the scent? Example: apple scented gel pen. What procedures does it have to go through to get the apple scent?

So how are scented gel pens created? Where do they get the scent from?

Solution

I\'m sure there are some safe options out there, but I wouldn\'t add random additives to the ink. It may alter the chemical structure of the ink, and other nasty things. Adding some kind of Ester, in its basic form would work

Esters are the result of a combination of an alcohol and a carboxylic acid. The science here is mostly classified as organic chemistry because it puts a large focus on functional groups. Functional groups are groups of atoms bonded together in a specific pattern that reveal specific chemical properties. The structure of an ester functional group is shown below. Note the distinct central Oxygen atom, an easy way to categorize the molecule as an ester.

The formation of an ester is a result of a multi step chemical reaction as shown below. For example purposes, the reaction shows an arbitrarily chosen acid and alcohol combination. However, in reality, different combinations of these two requirements will yield different ester scents and characteristics.

As mentioned before, the chemical reaction to form an ester is a result of the combination of an alcohol and carboxylic acid. The conditions for ester formation are very specific. It requires a catalyst of concentrated sulfuric acid and the addition of heat. This means the reaction is endothermic and has a positive change in free energy, or in other words, it has a catalyst and requires an activation energy.

This reaction is also known to be sped along by usingLeChatelier’s Principle. By adding excess alcohol or acetate in the formation can aid in pushing the reaction to produce more ester. In addition, a common technique used by manufacturers is to evaporate the water, also forcing the reaction to the right.

By adding the ester solution to the natural dye of the Pen, Mr. Sketch is essentially creating a scented ink. So when we draw on paper and smell the result, what we’re really recognizing is the presence of esters.