Let’s face it, most of us love the smell of leather. Of the 5 senses, smell is the most likely to trigger memories. Smell is the most underrated and least understood of our 5 senses. The science behind the smell of leather and how it gets its smell can be broken down into 4 areas.
Leather can smell Oaky, woody or Earthy depending on the tanning process and type of leather. Its important to note that smell will vary and is different for each individual. Scientists have spent years trying to perfect the right combination of ingredients to replicate specific smells.
Leather has been around for centuries and used for clothes, shoes, bags and many other items. It is extremely durable, beautiful and smells amazing. What is it exactly that makes leather smell so good?
What gives leather its smell.
The main “ingredients” that affect the smell of leather are the following:
- Type of leather.
- Tanning Process
- Dyeing process
- Oils, waxes and conditioners
The type of leather has a big impact on its smell. Cow hide smells different to horse hide which smells different to pig hide. This is because each animals hide has its own unique genetic composition that influences its thickness, strength, suppleness and smell.
The tanning process has a major influence on leather’s smell. The “ingredients or tannins” used in the tanning process can be natural eg. tree bark, leaves, fats and salts. Tree bark, leaves and salts are used to tan vegetable tanned leather or veg-tan. This is a more natural environmentally friendly process. It takes much longer than using chemicals, but the results are worth it.
Chrome tanned leather uses chemicals such as chromium salts in its tanning process and doesn’t give you the rich aroma of old-world veg tanned leather. Chrome tanned leather usually results in a softer leather. Its used mainly in the motor and furniture industry.
The tanning process can be complicated and vary greatly depending on the type of leather. Different leathers undergo different tanning processes, which have an affect on the overall smell of leather.
There are also other methods of tanning leather such as Aldehyde tanning. Today this method uses Glutaraldehyde or Oxazolidine. Previously Formaldehyde was used but it was found to be toxic. Aldehyde tanning is used when chrome free leather is required. It is used mostly when making baby shoes or some car leathers. This leather is usually white or cream in colour and is called wet-white leather.
Another tanning method is Alum tanning which uses Aluminium Sulphate in the process. This is similar to chrome salts but the bonding is different. This kind of tanning is used mostly for whips and lacing.
The dyeing process also plays a large role in leathers smell. There are a wide range of dyeing techniques. Some are chemical based and others use natural dyes. If the dyes are vegetable based the smells are usually more natural and pleasant. If synthetic dyes are used the leather will have a more chemical smell.
Oils, waxes and conditioners can also greatly influence the smell of leather. If possible, always first do a test on a small sample piece of leather so you can check if there is any kind of reaction.
How to keep the new leather smell for longer.
Is it possible to keep the leather smell so it lasts longer? Yes, you can keep leather’s original smell by applying leather conditioner. Conditioner helps revive and rejuvenate leather by replenishing lost oils etc. This helps clean the surface and remove any unwanted dirt and particles which could cause mould.
Another way to keep leather smelling new is to keep it safely stored away when not in use. This will protect it from damage, dirt and smells.
Does leather lose its smell after a period of time.
Yes, eventually leather loses its natural smell. It depends on the type of leather, how often its conditioned, how often its used and how and where it’s stored. Leather is porous, and will absorb the smell of its surroundings after a period of time. Things like chemicals, sweat, perfumes, pet smells will build up on the surface and diminish leathers natural smell. This is why its important to condition and clean leather regularly.
Can leather scent be created in a bottle.
Yes, apparently you can. There are conditioners for sale that are the same as the smell of leather. I’m not sure how good they are. Here’s a link to Aerostich who claim to have the perfect product that replicates new leather smell. It’s not cheap.
Why does some leather smell bad.
Leather is permeable and therefore can absorb sweat and other substances and smells like smoke, pet odour, dampness or musty smells. Storage conditions are very important in order to maintain and preserve leather. Too hot and the leather can dry out and crack. If it’s too humid it can cause mould to form and grow. Mould, is responsible for leather giving off that old musty damp smell. The mould gets into the damp leather and causes it to smell. Here is a link to a post I wrote on best conditions to store leather.
Mould and mildew love warm, humid conditions with a bit of moisture so the spores can multiply and grow. These are the perfect conditions for mould. If the area where your item is stored has little to no ventilation then you’ve hit the jackpot and your leather jacket will be stinking and musty in no time at all.
Faux leather, which isn’t real leather, has the worst smell as its made up of plastics, solvents and glues. These glues can react in hot weather and give off unpleasant odours. Note: one method to test if leather is real is to smell it. If your nose detects a chemical plastic smell then don’t buy it.
How to remove new leather smell.
There are a number of ways to remove that new leather smell.
The first method you should try is ventilating the item or furniture (if this is possible) keep the item of clothing outside for about 2 weeks. Remember to keep the leather out of direct sunlight as well as out of any rain or wet weather. This should reduce the new leather smell.
The second method is to use baking soda. Just brush it on lightly for a few minutes and leave on clothing for 5 minutes. Then wipe off all the baking soda and ventilate for a good while to see if the smell has been removed.
The third method is to wrap the item in newspaper. Place newspaper inside the jacket, shoes or bag etc. Put the item in a box for about 2-3 days. Remove the article of clothing and check to see if the odour has been removed.
The fourth method is to use coffee grounds or beans. Important note this method should only be used on dark leather as coffee has the ability to stain lighter leather.
Lastly, you can try vinegar or a diluted solution of vinegar in some water. The mixture should be 1 glass of water to 2 teaspoons vinegar. Note: first test on an unused or piece of leather that isn’t noticeable. This is just in case there is a reaction to the vinegar.
Saddle soap can also be used to lightly wash your leather. Follow the instructions.
Conclusion.
Hopefully you have learned everything you ever wanted to know about the smell of leather. Leather is a truly amazing material that ticks all the boxes and even smells great. What more could you ask for from this wonderful natural product.