Sodium Sidicate

🧪 What is the Role of Sodium Silicate in the Batik-Making Process?

Sodium Silicate, also known as water glass, plays an important role in the fixation stage of Batik dyeing—especially when using cold water dyes (like fiber-reactive dyes). It acts as a fixer or setting agent to help bond the dye to the fabric fibers, ensuring the colors are permanent, vibrant, and long-lasting.

🔍 Main Functions of Sodium Silicate in Batik:

1. Fixes the Dye to the Fabric:

   • Sodium silicate raises the pH level, which is essential for activating fiber-reactive dyes (commonly used in Batik).

   • This chemical reaction locks the dye molecules into the cotton fibers, preventing fading during washing.

2. Enhances Color Vibrancy:

   • It helps produce brighter and more intense colors by enabling better dye absorption and fixation.

3. Used After Dyeing:

   • Typically applied after the fabric has been dyed (and sometimes wax is removed first).

   • The fabric may be soaked or painted with a sodium silicate solution, and then left to cure before rinsing.

🧼 Aftercare:

Once sodium silicate has been used to fix the dyes, the fabric needs to be:

• Cured (left to rest, often 6–24 hours depending on method)

• Rinsed thoroughly with water and then washed with soap or detergent to remove any unfixed dye and chemical residue

⚠️ Safety Note:

Sodium silicate is a caustic substance—gloves and protective gear are recommended when handling it.