Read the grade data together
The grade designation ties the specification, safety data sheet and certificate of analysis to a particular product. Use documents for that grade when reviewing a sample or purchase order.
Check units and measurement conditions
For viscosity, ask for the method and measurement temperature. For pH, confirm whether the test uses the product as supplied or a defined dilution. Record the active-solids basis if it is used to compare trial doses, and confirm density where a feed system is calibrated by volume.
Keep the product and trial records connected
Record the grade, lot and document version with your test results. This makes it easier to explain differences between a laboratory trial and a subsequent shipment.
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