Laboratory Guides & Technical Notes
Technical notes on specifying laboratory glassware and reagents, from the team that supplies laboratories across Indonesia.
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Practical guidance for laboratory procurement
Written for the people who actually specify and order laboratory glassware: procurement officers, QC analysts and lab managers. Every figure quoted comes from a published standard or from our own catalogue data.
Selection Guides · June 1, 2026
Burette Class AS vs Class B: What the Tolerance Costs You
Class B is exactly twice the Class AS tolerance. Here is what that means as a percentage of your titre, why division is not tolerance, and when Schellbach or PTFE is worth paying for.
Selection Guides · May 15, 2026
Volumetric Flask Class A vs Class B: Which Tolerance Does Your Lab Actually Need?
Class B tolerance is exactly twice Class A. Here is the capacity-by-capacity data, a procurement decision table, and the ISO 4787 method for verifying a flask you already own.
Selection Guides · May 1, 2026
Laboratory Glassware Accuracy Classes: Class A, AS and B Explained
Class A, AS and B compared across flasks, burettes, pipettes and cylinders — with the real GLASSCO tolerance figures, and why the same class means five times the error on a cylinder.
Glassware and Materials · April 15, 2026
Borosilicate 3.3 vs Soda-Lime Glass: What Boro 3.3 Buys You
Borosilicate expands a third as much as soda-lime, which is why it survives a hotplate and an autoclave. What it resists, what still destroys it, and when plastic is the better answer.
Procurement · April 1, 2026
Buying Laboratory Glassware and Reagents in Indonesia
The six fields that make a glassware request unambiguous and the six that do it for reagents — plus who PT Praglas Raya is, what the catalogue covers, and how to get a quote.
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