How much PSI to cut through skin?

How much PSI to cut through skin?

Even relatively low pressures can break skin at close range — some studies and clinical reports note injection injuries occurring at pressures as low as 100 PSI when the nozzle is held directly against or very close to skin, though most documented injuries involve standard consumer or commercial pressure washers in the 1,500–4,000 PSI range using a narrow 0° or 15° tip. The danger isn’t just the visible cut; these injuries can inject water, paint, or debris deep into tissue, causing damage far more serious than the entry wound suggests. This is why manufacturers and safety testers universally recommend against ever pointing a pressure washer at skin, and why the 0° pinpoint nozzle is generally discouraged for any hand-held use altogether.