In most cases, the paint that you apply in your wall is made of dried solids – a blend of pigment and latex. However, the professional painters can add water to the paint so that it contains only 20-30% of solids. Painters usually do this to make the paint easier to apply. Once the paint is 
applied on your walls, the drying process starts.
Use of Labeled Touch Up Paint:
During the drying process, the water is removed through evaporating. The problem comes when you find some unwanted marks or cracks in the wall and you want to touch up the same by using the leftover paint. There are few problems that can arrive once the paint is dry, and you can get rid of these problems by using a touchup job. Therefore, having labeled touch up paint is important after your home has been painted.
The advantage of Labeling Leftover Paint:
However, if you had painted your house several years ago, it is quite impossible to use the leftover paint because the same are too old or perhaps there’s not enough left. The best way to get rid of this problem is to carefully label and store your leftover paint for the touchup job.
It is really problematic to store your paint in the original paint jar as the cans are much bigger and they need many spaces to store. Also, it is difficult to understand how much you have left and whether the paint is still usable.
The best way you can store the leftover paint is by storing them in smaller containers. You can use a transparent container that is clean and easy to open and carry when touching up the walls. You need to label the containers with the paint names and even mention the name of the brand. If possible, add more details as to where the leftover paint was originally used in the house. Labeling leftover paint like this way helps you a lot as you have all the information handy and it will be easier for you to quickly grab the exact leftover paint during the touch ups job. Always store the paint containers in an easily accessible place in your house so that it is kept in good condition.