Welcome to our cosmetic oil control efficacy testing service! Protheragen-ING offers comprehensive and reliable testing services to evaluate the oil control efficacy of cosmetic products.

Our testing program is designed to help cosmetic manufacturers and formulators evaluate the performance of their products and make informed decisions about formulation improvements.

Protheragen-ING's Oil Control Testing Service

Protheragen-ING evaluates the effectiveness of cosmetic products in improving facial skin oil by measuring the skin oil content of subjects before and after applying the test samples for a specified period of time. Our service can be applied to a wide range of cosmetic products that claim to have an oil-control effect.

Based on the duration of action, we categorize cosmetic oil-control effects into short-term oil-control (4 hours, 8 hours, etc.) and long-term oil-control (14 days, 28 days, etc.).

Protheragen-ING also offers customizable testing options to meet specific requirements or to address other issues related to oil control efficacy. If required, comparative testing can be conducted to compare the oil control efficacy of a product with similar formulations on the market, providing valuable insights for product positioning and competitiveness.

Skin Oil Content Test Method

Protheragen-ING compares the change in skin oil content before and after use to evaluate the oil control effect of the sample.

The skin oil tester is a commonly used instrument. It calculates the change in light transmittance of the oil-absorbing material in front of the probe to obtain the skin oil content value. The more grease this material absorbs, the more transparent it becomes and the amount of light transmitted increases.

The test area is usually chosen on the forehead near the eyebrows. There are two reasons for this:

• The hair follicles in the T-zone of the face are more concentrated than in the cheeks and produce more oil, providing enough space for a before and after comparison of values.
• The forehead near the brow has a larger flat area compared to the rest of the T-zone, making it easier to mark the test and perform the test.

During the test, the probe is applied to the skin at a constant pressure for 30 seconds to obtain the oil content of the skin.

Evaluation Procedure

• Subject Screening

Two areas (2 x 2 cm²), left and right, were marked on the forehead and randomly divided into a test area and a control area.

We tested the oil content of the two areas for initial screening to ensure that the difference between the marked areas was within acceptable limits. Subjects whose differences did not meet the inclusion criteria would be asked to discontinue participation in the assessment test.

• Basal Value Collection

Subjects performed specific steps of facial cleansing as required using cleansing products provided by the center. We then measured the base value of the subject's forehead oil content.

• Test Sample Application

A quantitative test sample was applied to the test area of the subject according to a randomized table and massaged until it was completely absorbed. Afterward, the subjects sat in an environment with a temperature of 21±1℃ and a humidity of 50±5% RH.

• Oil content measurement

Based on the time points identified in the protocol, the laboratory technician measured the oil content of the two areas of the subject's forehead after a corresponding period of time and recorded it.

• Detailed Test Report

Upon completion of the testing process, a comprehensive report is provided summarizing the methodology, results and observations. The report includes quantitative data, a visual assessment of the results, and recommendations for improving oil control efficacy if necessary.

Our cosmetic oil control efficacy testing services are designed to assist in the development of high-quality products that effectively manage oiliness and provide a matte finish. Contact us to gain valuable insight into the performance of your cosmetic formulations. We will respond within 2-4 working days.