Hi:

    I found some old silkspan in my attic and used it to patch some holes in an old Nobler.  To say this stuff is thick is an understatement.  It was about as thick as 4 sheets of high quality toilet tissue,  Quilted type you know.

    I could only tear in in one direction and that was with all the strength I could muster.  It was impossible to tear  in the other direction!!!!!  It acted like silkspan when applied.
    I shrunk well and absorbed dope like a, you fill in your own answer here! Lol 

    What do you think this stuff was.  It is at least 35 years old if not much older.  Perhaps it was not silkspan at all. 

      Any ideas as to what it is?

                                                                                          Tia,

                                                                                          Frank

Could have been "Bamboo paper", lots of old time free flight designs from the late 30's on through the 40's called for this as the covering material.