What type of material is primarily used for packaging in crime scene processing?

In crime scene processing, paper is primarily used for packaging due to its ability to minimize contamination and preserve the integrity of evidence. Paper is breathable, which helps prevent the build-up of moisture that could degrade certain types of evidence, such as biological materials or latent fingerprints. It is also lightweight and does not produce static electricity, making it suitable for handling delicate items without risking damage. Additionally, paper materials can be more easily written on for labeling purposes, allowing for clear documentation of the evidence. This choice reflects best practices in evidence handling and ensures that the physical and chemical properties of the evidence are maintained during transportation and storage.