How are small dry objects typically packaged for evidence collection?

Small dry objects are typically packaged in plastic bags for evidence collection because plastic bags can help prevent contamination and moisture, which might alter or degrade the evidence. When dealing with small items, such as pieces of broken glass, fabric, or paper evidence, using plastic bags ensures that the objects are secured and visible without the risk of them falling out. Furthermore, plastic bags are lightweight and easy to handle, which facilitates the transportation and labelling process.

While heavy paper bags can also be used for other types of evidence, they may not be ideal for smaller objects, as they don't provide the same level of visibility and protection as plastic. Cardboard boxes are generally reserved for larger or bulkier items, and vacuum-sealed containers might be used for preserving biological evidence but can be overly complex for simple small dry objects. Thus, plastic bags serve as the most practical and effective choice for this scenario.