Calculating Ingredient Usage Percentage: Weight vs. Volume

Asked by: korakodfreedom On: September 11, 2018 Product Type: Cosmetics

Question

How should I calculate the usage percentage for ingredients like Thyme Kill™ (0.05-0.1%) and NaturePreserve™ (0.75-2.0%)? Should I calculate by weight or by volume (milliliters)?

Answer

Based on the information provided, the staff has already correctly advised that ingredient usage rates should be calculated by weight, not by volume (milliliters).

Here's why:
Ingredients have different densities. A percentage by volume would mean different amounts of the actual substance depending on its density, leading to inaccurate formulations. Percentage by weight ensures that you are using a consistent proportion of the ingredient relative to the total weight of your product.

Therefore, to achieve the recommended usage rates (0.05-0.1% for Thyme Kill™ and 0.75-2.0% for NaturePreserve™), you should measure the ingredients by weight using a scale, not by volume using milliliters.

The staff also provided a link for further information, which you should review.

Tags

Amount Calculation Cosmetic Formulation DIY Formulation Usage Percentage