Down-Draw Process

Down-Draw Process of SCHOTT Advanced Optics
The down-draw process developed exclusively by SCHOTT is used in Grünenplan to produce thin glasses and ultra clear flat glasses. During this process, a ribbon of glass is pulled down from the top, moving across various drums and through the cooling track.

Advanced Optics uses this process to produce SCHOTT AS 87 eco, the D 263® series, and AF 32® eco glasses, among others.

Main characteristics of the down-draw process
  • A flawless surface with a surface roughness of < 1nm
  • Broad thickness spectrum from 1.1 to 30 µm
  • Fast conversion to various glass types
  • Very high TTV (total thickness variation) and curvature specifications
  • High flexibility in regards to output and thickness.
SCHOTT North America, Inc.
400 York Avenue
Duryea, PA 18642
E-Mail to SCHOTT570-457-7485
News, Exhibitions & Events
Exhibition Optatec, Frankfurt, Germany, 05-15 to 05-17-2018
Exhibition OPIE - Space & Astronomical Optics EXPO, Yokohama, Japan, 04-25 to 04-27-2018