Potassium Aluminum Sulfate Mordant: A Must-Have For Dyeing Enthusiasts!

Aluminium Potassium Sulphate (Alum) Mordant Reagent 200g Sulfate

The Basics of Potassium Aluminum Sulfate Mordant

Potassium Aluminum Sulfate, or Alum, is a chemical compound that has been used for centuries as a mordant in dyeing. A mordant is a substance that helps fix the dye to the fabric, making it more durable and long-lasting. Alum is a popular choice for natural dyeing, as it is readily available and relatively inexpensive.

How Does Potassium Aluminum Sulfate Mordant Work?

When fabric is dyed, the dye molecules bond to the fibers of the fabric. However, without a mordant, the dye can easily wash out or fade over time. Potassium Aluminum Sulfate works by forming a chemical bond between the fabric and the dye molecules, making the color more permanent.

Benefits of Using Potassium Aluminum Sulfate Mordant

One of the biggest benefits of using Alum as a mordant is that it is safe and non-toxic. It is also easily accessible and affordable, making it a popular choice for natural dyers. Additionally, Alum helps to brighten and intensify colors, making them more vibrant and long-lasting.

How to Use Potassium Aluminum Sulfate Mordant

Using Alum as a mordant is a straightforward process. Here’s how to do it: 1. Pre-wash your fabric to remove any dirt, oils, or sizing. 2. Dissolve 1-2 tablespoons of Alum in warm water for every pound of fabric. You can also add 1-2 tablespoons of Cream of Tartar to the mixture to help brighten colors. 3. Add the Alum mixture to a pot of simmering water and stir well. 4. Add your fabric to the pot and simmer for about an hour, stirring occasionally. 5. Remove the fabric from the pot and rinse well with cool water.

Tips for Using Potassium Aluminum Sulfate Mordant

– Always wear gloves when handling Alum, as it can be irritating to the skin. – Experiment with different concentrations of Alum to achieve different effects. – Add other natural mordants like iron or copper to achieve different colors and effects.


Potassium Aluminum Sulfate Mordant is an essential tool for natural dyers looking to achieve long-lasting, vibrant colors. It is safe, affordable, and easy to use, making it a popular choice for dyeing enthusiasts around the world. So why not give it a try and see the difference it can make in your natural dyeing projects?