I AgreeWe use Google Analytics to understand how visitors use our website. The cookies we collect are in an anonymous form.
For more details check out Cookie Policy and our Privacy Policy

T: +44 (0) 114 290 1801
E: enquiries@glass-ts.com


Littleton Softening Point

Make an enquiry

Make an enquiry



Example Temperature-Viscosity PlotThe littleton softening point is the temperature at which the log (viscosity) for a glass is 6.6 Pa/s. This temperature is usually beyond that of typical service for the glass, but needs to be known - especially if firing an enamel or frit onto a glass article – giving an absolute maximum upper temperature limit for processing of the glass.

Measurement is conducted using the international standard ASTM C338 for fibre elongation in which the temperature of the fibre is increased at a standard rate and elongation measured against time. This test gives confidence for operating limits in downstream manufacturing processes, comparison of softening points between glasses without need for full viscosity curves, expert interpretation and advice to help clients understand and use this data.

  • ASTM C338-93   Standard Test Method for Softening Point of Glass

Please contact us, or make an enquiry using the form above, if you have any bespoke requirements, require further information, or would like a quote for analysis.



Latest News

Case Studies & Projects

EnviroGlass - Decarbonisation and batch reformulation

EnviroGlass - Decarbonisation and batch refor...

The EnviroGlass project set out to investigate the challenges identified within the glass industry’s 2050 decarbonisation roadmap and identify cost-effective...

Read more...


Accreditation Accreditation Accreditation Accreditation