When considering whether an object can be cleaned, what characteristic must technicians evaluate?

The characteristic that technicians must evaluate when considering whether an object can be cleaned is its porosity. Porosity refers to the structure and composition of the material, specifically how porous or absorbent it is. Materials that are porous, such as fabrics, wood, and certain types of stone, can absorb contaminants, fluids, and biological materials, making them more challenging to clean effectively. Technicians need to assess porosity to determine the appropriate cleaning methods, solutions, and techniques to protect the integrity of the object while effectively removing contaminants.

In contrast, evaluating aesthetic appeal, age, and market value does not directly inform the cleaning process. These factors may influence the decision to clean or restore an item but do not determine whether it can actually be cleaned without sustaining damage. Therefore, focusing on porosity is essential for ensuring proper care and handling during the cleanup process.