Volumetric Flasks Class A are made from ASTM E 438 TYPE 1 CLASS A heat resistant BORO 3.3 Glass that meet ISO 1042 standard with individual work certificate and serial number.
The calibration is done on automatic computer controlled machines and are calibrated to contain (TC, In) according to the ISO tolerance standards.
These are supplied with PP stoppers or glass stoppers in both amber and clear glass.
All A Class flasks are printed in Blue color & B Class in White colour
Amber Glass is marked in white colour the meniscus mark is diamond grinded for longer persistence and better accuracy.
All Class A Volumetric Flask comes with Conformity Batch Certificate or Individual Work Certificate and hace "DE-M" mark printed on the flask.
All the QR Coded Flasks come with Blue Marking Ring on Clear Flask & White Marking Ring on Amber Flask for better Visibility of Meniscus.