[yarddog]

I have no idea what it was made of. It is the flag of some of my ancestors.

[Red Badger]

Most likely muslin, a cotton cloth commonly used today as sheets and pillowcases.

The colored parts were most likely printed with a wooden block and press, for ease and quick manufacture of lots.

https://books.google.com/books?id=812jBQAAQBAJ&pg=PA396&lpg=PA396&dq=confederate+flags+made+in+england?&source=bl&ots=7Ih-F1r3_R&sig=JD7PD04cehn_ZnWsaAYs6n4okQM&hl=en&sa=X&ei=QQZWVbm2HcGNsAWGpYGoBg&ved=0CCYQ6AEwAQ#v=onepage&q=confederate%20flags%20made%20in%20england%3F&f=false