Determination of Product Thickness Applied on Different Areas of the Face Using a Multispectral Imaging Method

Study Overview
=================
Brief Summary
-----------------
The aim of the study is to determine: the thickness of the RV4369A truly applied on different areas of the face after single application of the product determined by a multispectral imaging method. the influence of a second application of the product 15 to 30 minutes after the first application on the product thickness determined by multispectral imaging method. the influence of the recommendations of use provided to the subjects before application of the product on the product thickness determined by multispectral imaging method .

Detailed Description
-----------------
This study is a monocentric, comparative, open study performed on the face and forearms of healthy adults. Planning of the visits: Visit 1: Inclusion visit (D1) Visit 2: End of study visit (D10), a window of +/- 2 days is allowed for this evaluation, * The theoretical study duration for each subject is 10 days. The maximal study duration for each subject is 12 days.

Official Title
-----------------
Determination of the Thickness Truly Applied of the SPRAY50+ on Different Areas of the Face Estimated by a Multispectral Imaging Method, After Application of the Product With and Without Recommendations of Use by a Group of Healthy Subjects

Conditions
-----------------
Sunscreen

Intervention / Treatment
-----------------
* Other: RV4369A cosmetic product


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Dry, normal to combination skin Phototype I to V inclusive. Absence of significant facial hair. Exclusion Criteria: Population Pregnant, breastfeeding women. For men: moustached or bearded. Substantial hair on the forearm and face. Application of keratolytic or self-tanning products to the face, forearms and arms in the four weeks prior to inclusion. With scars or other cutaneous characteristics, sunburn on forearms in the test areas, the size of which is considered incompatible with the study. Application of water, cleansing or beauty products to the forearms and arms since the last wash on the evening before inclusion. Diseases : Known history of allergy to any of the investigational product ingredients. Known history of allergy to latex. Skin lesions or skin disease on the face or on the arms and forearms that may affect test results (seborrheic dermatitis, atopic dermatitis, psoriasis, acne, rosacea, etc.). Treatments: Ongoing local or Oral treatment (retinoids, anti-inflammatory) that may affect test results.

Ages Eligible for Study
-----------------
Minimum Age: 20 Years
Maximum Age: 55 Years

Sexes Eligible for Study
-----------------
All

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Treated Group<br>all subjects will apply the study product RV4369A | Other: RV4369A cosmetic product<br>* The product is applied 1 or 2 times during the 2 study visits. The product is recovered by the technician after application of the product by the volunteer. Application modalities: Inclusion Assessment: The study product is given to the volunteer who applies it to his face (forehead) according to his usual habits. After a waiting time and Multispectral camera measurements, the study product is again applied by the volunteer to his face according to his usual habits. Final assessment: The study product is applied by the Clinical Research Technician on the subject's forearm on 4 delimited areas at specific quantities. After a waiting period and Multispectral camera measurements on the forearm areas, the study product is given to the volunteer who applies it on his face according to the recommendations of use provided by the Technician.<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Amounts of sun spray applied to the face, measured by multispectral imaging after single application by the subject | The product quantity applied by the subject (mg/cm2) will be extrapolated from a reference curve build using an image analysis technique | Visit 1 (Day 1) | 
| Amounts of sun spray applied to the face, measured by multispectral imaging after 2 applications by the subject | The product quantity applied by the subject (mg/cm2) will be extrapolated from a reference curve build using an image analysis technique | Visit 1 (Day 1) | 
| Amounts of sun spray applied to the face, measured by multispectral imaging after 1 application by the subject and according to the recommendations of use provided by the technician | The product quantity applied by the subject (mg/cm2) will be extrapolated from a reference curve build using an image analysis technique | Visit 2 (Day 10) | 
| Comparisons between measurements of sun spray amounts determined by multispectral imaging | Comparaisons between an application without recommendations of use (Visit 1), an application without recommendations followed by a second application (Visit 1) and an application according to the recommendations of use (Visit 2) | Visit 1 (Day1) and visit 2 (Day 10) |