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.
Glassware and Materials · October 15, 2026
Reagent Bottles: Glass or Plastic, Narrow or Wide Mouth
Glass by default, plastic where the chemistry attacks it. Sizing a bottle to consumption rather than to price, why the cap is part of the specification, and the five fields every storage bottle needs.
Selection Guides · October 1, 2026
Beaker Selection: Griffin Low Form vs Berzelius Tall Form
A Berzelius beaker holds the same volume 10 to 15 mm narrower and up to 35 mm taller. What that changes for evaporation, splash and heating rate, with the full dimension table.
Reagents and Chemicals · September 3, 2026
Reagent Storage and Shelf Life in a Tropical Laboratory
A certificate describes the day of release. Segregation by hazard class, humidity in a tropical store room, open-bottle dating, and the quarterly check that catches the rest.
Reagents and Chemicals · September 1, 2026
ACS, ISO and Ph. Eur.: What a Reagent Certification Guarantees
The marks after a grade name say whose published specification the batch also meets. How to read a real label, what a lot-specific certificate of analysis must show, and when the mark is mandatory.
Reagents and Chemicals · August 17, 2026
Analytical Reagent Grades: EMSURE, LiChrosolv and What They Guarantee
A grade is a specification, not a purity figure. What EMSURE, LiChrosolv, Suprapur, Certipur and Titripur each control, and how to match a grade to a method.
Glassware and Materials · August 3, 2026
Ground Glass Joint Sizes Explained: What 14/23 and 29/32 Mean
The two numbers are the cone diameter and the ground length in millimetres. Why one flask capacity ships in five different joints, and how to standardise a bench so the glass connects.
Selection Guides · July 15, 2026
Erlenmeyer Flask Selection: Neck, Closure and Capacity
Pick the neck, not the flask. Narrow against wide neck bore at every capacity, screw cap against ground stopper, and how full a conical flask should actually be.
Selection Guides · July 1, 2026
Volumetric vs Graduated Pipettes: Which One Your Method Needs
Above 5 ml a graduated pipette is two to three times looser than a one-mark pipette. Full tolerance tables for both GLASSCO ranges, colour band codes, and where glass stops being the right tool.
Selection Guides · June 15, 2026
Measuring Cylinder Class A vs Class B: When the Certificate Matters
The nine-capacity tolerance table, why a Class B flask beats a Class A cylinder at every volume, and the cases where the batch certificate actually earns its price.
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