sentences:  The necessary environment to maintain or prolong the current state of that material, and which treatments will have the least amount of reaction and impact on the materials of the objects being studied, are the primary goals of conservation research.Conservation treatments fall under four broad categories including cleaning, desalination, consolidation, and deinfestation.Knowledge of the material properties of cultural heritage and how they deteriorate over time helps conservators formulate actions to preserve and conserve cultural heritage.