The Inverted Cup Test: Gel Strength You Can Measure Without a Rheometer
A 200 ml cup, a piece of mesh and ten minutes gives a repeatable gel strength number. How to run it, read the drip weight, and where a firm gel still fails.
A Beaker, a Stopwatch and One Afternoon: Qualifying a New SAP Supplier
No lab, no chemist: three bench tests that separate a good SAP lot from a bad one in an afternoon, with pass limits you can write into a purchase order.
