HEAL Study: Healing Results, Efficacy and Acceptability of a New Contact Layer

Inclusion Criteria: A. Related to every wounds types: * Patient over 18 years old who has provided his/her written informed consent * Patient affiliated to the French Social insurance * Patient who can be monitored by the same investigation team throughout the whole duration of the study, * Acute wound (postoperative non-cavitary and non-sutured wound, superficial, middle or deep second degree burn, dermabrasion) or chronic wound (venous or mixed leg ulcer, pressure ulcer) or epidermolysis bullosa skin lesion * Use of a contact layer as a primary dressing justified by the wound B. Related to leg ulcer: * Venous leg ulcer or mixed leg ulcer, i.e. with an Ankle Brachial Pressure Index (ABPI) not less than 0.7 and not more than 1.3, (0.7≤ABPI≤ 1.3) * Patient who agrees to wear an effective venous compression system every day, associated with the trial dressing C. Related to pressure ulcer: * Stage 2, 3 according to the EPUAP (European Pressure Ulcer Advisory Panel) classification system * Wound on the pelvis (trochanter, ischio or sacrum) or on the heel Exclusion Criteria: * Patient under authorship or guardianship * Woman of child-bearing potential who has no effective contraception method * Pregnant or breastfeeding woman * Patient taking part in another clinical trial * Patient with a known allergy to carboxymethylcellulose (hydrocolloid), * Patient with a severe illness that might lead to the premature discontinuation of the trial before the 4 weeks of treatment * Wound requiring surgical treatment or for which surgery is scheduled during the 4 weeks after inclusion * Patient with an evolving neoplasia condition, treated by radiotherapy, chemotherapy or hormone therapy * Malignant wound * Patient with a systemic infection not controlled by suitable antibiotic treatment, * Wound which is clinically infected