A good question.
Unlike HIV which dies once it's outside the body, HCV is resilient.
This is why we aren't supposed to share razors. That tiny little speck of blood you can't see, may have some live virus on it.
At room temperature, the lifespan of hepatitis outside the body C ranges from 16 hours to 4 days. Dried blood is infectious during this period. Proper cleaning is critical to preventing spreading of the disease.
I found this research doing a simple search.
Seeing they used chimpanzees, its hard to say if its exactly the same for us.
In a study conducted by the CDC, Dr. Kris Krawczynski, concluded that hepatitis C remained viable up to 4 days. The study began with blood plasma samples infected with hepatitis C that were dried. Samples dried overnight formed one group, and the others were from dried samples stored for 4 days and 7 days in a climate-controlled cabinet. Chimpanzee groups received injections of the samples and monitored for development of hepatitis C virus antigen, signaling HCV infection in the chimpanzees. Only those who received samples dried overnight for 16 hours and dried overnight and stored for 4 days developed hepatitis C. These findings led to the conclusions of the CDC's study.
http://www.ehow.com/how-does_5431719_long-hepatitis-survive-outside-body.html
How long does the Hepatitis C virus survive outside the body?
The Hepatitis C virus can survive outside the body at room temperature, on environmental surfaces, for at least 16 hours but no longer than 4 days.
http://www.cdc.gov/hepatitis/c/cfaq.htm
I would suggest following the link and educate yourself on hep c transmission
I read inside the human body .