How long does blood sit before it gets spun?

Blood typically sits for a short period, usually about 30 minutes to an hour, before being spun in a centrifuge. This waiting period allows for the separation of the blood components, as the cells settle to the bottom while the plasma rises to the top. However, the specific time can vary depending on the type of test being performed and laboratory protocols. It's important to process the blood samples promptly to ensure accurate results.