Buffering Agent
A concentrated aqueous solution of sodium oxide and silicon dioxide provides high alkalinity and stable pH control in industrial textile wet processing. The use of sodium silicate waterglass ensures that the dye bath maintains a pH of around 10.5 to 11.0 during cold pad-batch dyeing. This specific range is necessary to activate the cellulose fibers without causing hydrolysis of the reactive dye.
Alkali Reserve
High buffering capacity prevents changes in acidity caused by atmospheric carbon dioxide or acidic impurities on the fabric. In textile processing, sodium silicate waterglass acts as a chemical reservoir that releases hydroxyl ions as they are consumed by the dyeing reaction. This action maintains a constant fixation rate throughout the hours-long batching process.
Viscosity Shift
Changes in temperature or concentration can cause the liquid to thicken and become difficult to rinse away.
Washout Requirement
Thorough hot washing is required to remove the chemical residues from the fabric after the dyeing reaction is complete. If sodium silicate waterglass is allowed to dry on the cotton fibers, it forms hard, glass-like deposits that make the fabric harsh and cause tearing during sewing. Utilizing soft water and acid neutralizers during the wash cycle ensures complete removal, leaving the fabric ready for finishing and garment manufacturing.
