I found this old report (2003-2004) and I thought it to be very interesting as a DE shaver. I thought others might enjoy reading it especially those who are buisness graduates or work in production or manufacturing fields. I did just a quick read picking and choosing areas of interest to read such as the prospects, different types of blades, cost..ect.
http://www.dcmsme.gov.in/publications/traderep/razorblades.pdf
This is pdf.
http://www.dcmsme.gov.in/publications/traderep/razorblades.pdf
This is pdf.