Adding Extracts to Ready-Made Bases

The maximum percentage of extracts you can add to a ready-made base depends heavily on the specific base and the nature of the extract itself (e.g., water-soluble, oil-soluble, concentration). Adding too much can destabilize the base, change its texture, or reduce its effectiveness.

Here's what the descriptions indicate for the bases you listed:

• Absolue Soft Cream Base (compare to Lancome): The recommended usage rate for this base is 90-100%. This means you can add a maximum of 10% of other ingredients in total, including extracts.
• Aloe Vera Gel (Heavy): The description provides mixing instructions for adding liquid and powdered substances but does not specify a maximum percentage for total additives or extracts.
• Cica Sleeping Mask Base (compare to Laneige): This base is designed to accommodate various active ingredients. It specifically mentions it can accommodate a maximum of 10% oil or silicone. It does not state a general maximum percentage for water-based extracts or other active ingredients, but adding large amounts of liquid extracts should be done cautiously to maintain stability.
• Water Sleeping Mask Base (compare to Laneige): Similar to the Cica base, this base is ready to add various active ingredients. The description does not provide a specific maximum percentage for adding extracts or other active ingredients.

General Guideline:

When adding extracts or active ingredients to ready-made bases that don't specify a maximum percentage, it's generally advisable to start with lower concentrations (often 1-5% for many extracts) and observe the stability and texture of the final product. Avoid adding a very high percentage of liquid extracts, as this can thin the base or cause separation. Always test your formulation to ensure stability and desired performance.