SCHOTT GOETHEGLAS - restoration glass for the 18th & 19th century


At a Glance

Historical in form, innovative in function

GOETHEGLAS is a colorless, drawn glass with the irregular surface characteristic of window glass common to the 18th and 19th centuries. It can also be used to protect precious, leaded glazing from the elements and other adverse environmental conditions.
Restoration glass used in the orangerie in the castle of Schwerin - Germany
Restoration glass used in the orangerie in the castle of Schwerin - Germany
  • GOETHEGLAS for buildings from the 18th and 19th centuries
  • irregular surface
  • also available with enhanced UV protection
  • a wide variety of processing options (e.g. as laminated glass, with coatings or as insulating glass units)

Watch our videos: SCHOTT Glass for Restoration


SCHOTT GOETHEGLAS is unique due to ...
... Design ...
  • historical appearance and replication of the original glazing materials
  • irregular surface structure for windows of buildings from the 18th and 19th centuries

.. Quality ...
  • no harsh reflections (like float glass) that disturb the aesthetic impressions made by historic windows
  • high quality of restoration of original-looking aesthetics and former glamor
  • historical Fourcault process to produce colorless, drawn glass
... Processing ...
  • availability of larger glass thicknesses enables static analysis of larger formats
  • variety of processing options as laminated glass, tempered glass or as insulated glass units
  • innovativeness in function suits contemporary needs for thermal, solar, UV and noise control
  • security in every possible way, e.g. theft protection and overhead mounting

Area of Applications

  • for windows of buildings from the 18th and 19th centuries
  • winter gardens
  • balconies
  • infill of balustrades
  • processing: laminated glass, heat-strengthened and insulation glass

Technical Information

GOETHEGLAS is produced through the Fourcault process, the first fully mechanised process for the continual manufacture of sheet glass with its first industrial plants in 1914.

In this process, molten glass is drawn through the Fourcault nozzle that produces the distinctive appearance of machine-drawn glass with a certain thickness tolerance and wavy surface.
Production of SCHOTT restoration glass by machine up-draw process
Production of SCHOTT restoration glass by machine up-draw process
  1. preparation of batch
  2. fill-in of batch
  3. glass melting
  4. up-draw process
  5. cooling down
  6. edge cutting
Max. dimensions* 2,100 x 1,500 mm
Standard thickness* 4.5 mm
Light transmission rate: > 90%
*Other dimensions and thicknesses available upon request

Restoration glasses with ETA approval

Restoration glasses with ETA approval

ETA or abZ

  • As part of European harmonisation, the customary abZ (Germany’s national technical approval) is used only nationally when no European harmonised specifications are available.
  • The ETA (European Technical Assessment) replaces the abZ for member states of the European Union.
  • The point of contact for both certifications is the Deutsches Institut für Bautechnik (DIBt – German institute for construction technology). 


  • Glass produced according to SCHOTT’s special Fourcault drawn-glass process is not covered by the usual glass standards. Products using this process are therefore also not subject to automatic regulation.
  • ETA now confirms that SCHOTT Fourcault glass meets the requirements of the standards EN 12150-2, EN 14179-2, EN 14449 and EN 1279-5.
  • ETA therefore represents an independent, Europe-wide valid certificate of performance for SCHOTT Fourcault glass as both a base glass and a processed product (toughened safety glass, laminated safety glass, laminated glass and insulating glass units).
  • Extensive material testing at an accredited testing institute confirm the certified product properties.

Customer benefits

  • Customers can be assured that SCHOTT Fourcault glass can be processed into standard construction products (such as toughened safety glass, laminated safety glass, laminated glass and insulating glass units) in accordance with standards and can be designated as such.
  • No more time-consuming documentation and approval procedures.
  • Processing options can be clearly communicated to customers using familiar terminology.


Please download our Project Report for detailled project information:
Please download our Instructions for further information:


If you have a product inquiry, questions for service & support or other topics for SCHOTT GOETHEGLAS, please click the contact button. You will be forwarded to our contact form.
SCHOTT uses Cookies on this Website to enhance the user experience and provide the best possible Service. By continuing to browse the Website, you consent to our use of Cookies.