If you have already installed natural stone worktops or you are planning on installing stone surfaces, it’s important to know how to care for these surfaces. Just as you need to know how to clean your worktops, you also need to keep in mind that there are a few substances that are particularly harmful in terms of etching. The pH factor When you work with different ingredients in your kitchen, you might not be aware of the fact that different foods have different pH levels. The lower the pH, the more acidic the substance. 7 is considered to be neutral on the pH scale but this also does not mean that alkaline substances cannot cause harm too. Of all the foods out there, alcohol (like wine), fruit juice, tomatoes, vinegar and pasta sauce have a pH level of between 2 and 3. If you find this surprising, here are the