My understanding is that Ray Harlan's balloons are heat sealed.  I cannot say that they have no glued seams at all. 
 By the way, the Harlan Mylar 35" balloon is made from 8 gores.
 
 LeoP
Received on Thu May 01 2014 - 16:05:33 CEST
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:48 CET