Based on the provided video excerpt, the white foundation is used to blend with your current formula of foundation. The user applies it down toward the mouth, ensuring it's the same formula for seamless blending using a sponge.
In essence, the technique involves:
- Applying White Foundation: Apply the white foundation to the desired area. (In the video, the demonstrator applies it down toward the mouth.)
- Blending: Blend the white foundation with a sponge. The speaker in the provided transcript notes, "because it's the same formula, you know it's going to blend in perfectly just taking the same sponge. I'm going to begin to blend this in."
Therefore, white foundation, particularly if of the same formula as your regular foundation, can be blended with your current foundation.