Keywords: Glindemann PTFE Sealing Ring for Taper Joint Glassware.JPG Left PTFE Sealing Ring looks white on ground glass taper size 14 mm Right PTFE Sealing Ring becomes transparent once under pressure between inner and outer part of taper joint en wikipedia Armando-Martin CommonsHelper 2007-10-17 ; October 9 2007 photograph date Scientist0815 wikipedia en ; Dietmar GLINDEMANN photographer Scientist0815 Original upload log page en wikipedia Glindemann_PTFE_Sealing_Ring_for_Taper_Joint_Glassware JPG 2007-10-17 07 25 Scientist0815 1402×1479× 201684 bytes <nowiki>Left PTFE Sealing Ring looks white on ground glass taper size 14 mm Right PTFE Sealing Ring becomes transparent once under pressure between inner and outer part of taper joint Picture taken on October 9 2007 by Dietmar GLINDEMANN Article Ground </nowiki> Laboratory glassware |