John D. Zuccarino wrote:It seems that apparently over 30 years of independent testing has been done. Some testing has been done very secretly by the French, sneaky French. Who knew? Very few people obviously.
I'm not surprised about this.
From the History and Revival of Screwcaps written in 2001 from www.wineoftheweek.com
"On 10th August 1889, Dan Rylands of Barnsley in the UK patented the screwcap. It was some time, however, before this advance in bottle and jar closures was used on wine bottles ........ It wasn't until the introduction of the Stelvin screwcap, developed in the late fifties by the French manufacturer, La Bouchage Mecanique and now the registered trademark of Pea-Pechiney, a French manufacturer of bottle seals, that the seal became to be recognised as a quality product".
Laboratory trials started in the 1960's and in the early 1970's even Haut Brion trialled the screwcap.