Adjusting pH of Acidic Toner Formulation

Both Triethanolamine and Sodium Hydroxide can be used to adjust the pH of your toner formulation upwards (make it less acidic/more alkaline).

Here's a breakdown of each:

• Triethanolamine 99%: This is a high-purity type suitable for cosmetic formulations. It is used to increase alkalinity (increase pH value).

  • Usage Rate: 0.1-2.5%. Do not use more than 2.5%.
  • Mixing Method: Add during the step where you need to adjust the pH.
  • Caution: Do not touch the skin directly. If unsure, check information before use.

• Sodium Hydroxide: Also known as Caustic Soda, it is commonly used to increase the pH of cosmetic formulations.

  • Usage Rate: 0.1-5%. Do not use more than 5%.
  • Mixing Method: Add during the process to adjust the pH.
  • Caution: Avoid inhaling fumes when adding to water. It is easily moistened, so keep it sealed properly.

Regarding Sodium Hydroxide dissolution:

Sodium Hydroxide dissolves easily in water. For adjusting pH in a formulation, it's best practice to prepare a dilute solution first rather than adding the solid directly. A common concentration is a 10% solution.

To make a 10% Sodium Hydroxide solution:
Mix 10 grams of Sodium Hydroxide with 90 grams of water.

Add this dilute Sodium Hydroxide solution drop by drop to your toner formulation, stirring well and checking the pH frequently with a pH meter or pH strips until you reach your desired pH level. Always add slowly, as pH can change rapidly, especially near the neutral point.