How to Qualify a New Masterbatch Supplier: A Buyer's Checklist
Changing masterbatch supplier can cut cost, shorten lead times or solve a problem your current grade cannot. It can also stop a line. A structured qualification gets the benefit without the risk.
Converters usually look for a new masterbatch supplier for one of a few reasons: price, long or unreliable lead times from an overseas source, a technical problem the current grade does not solve, or a customer requirement such as PFAS-free, Halal or food-contact documentation. Whatever the reason, the new grade has to match or beat the current one on your line, batch after batch.
Start with the paperwork. Before a sample arrives, ask for the technical data sheet, safety data sheet and an example certificate of analysis, plus whatever regulatory statements your customers need: food-contact declarations such as EU 10/2011 or US FDA, REACH SVHC and RoHS statements, and PFAS-free or Halal status where relevant. Gaps here are cheaper to find before a trial than after.
Then trial in stages. A small lab sample confirms dispersion and basic compatibility. A pilot quantity lets you run the grade on a production line for a short period. A full line trial, long enough to cover start-up, steady running and a product change, shows whether it works in your real conditions. Agree the pass criteria in advance, measured against your current grade, not against a data sheet.
One good batch proves little. Ask for at least two or three production lots during qualification, and compare their certificates of analysis and your own results. Consistency between lots is what keeps your line stable once the grade is approved.
Six questions to ask before you approve a supplier.
Ask how additives are dosed in production. Gravimetric dosing gives more consistent loadings than volumetric.
Ask what the COA measures and how results are recorded and traced back to raw materials.
Ask about certification, or the plan and timeline if it is being built, and whether you can audit the plant.
Ask to be notified before any change to raw materials, formulation or production site.
Confirm minimum order, lead time and safety stock, for the approved grade, in writing.
Ask who will attend trials and support you if a problem appears after approval.
Plan a dual-supply period. Keep your current grade approved while the new one builds a track record, so you have a fallback if a lot is out of specification or a shipment is late.
Aviura supplies development lots from 10–20 kg so you can qualify a grade without committing to a full order, with TDS, SDS and batch COA for every grade and regulatory statements prepared by grade. Our quality system is being built to ISO 9001. Tell us the grade you use today and the problem you want to solve, and we will propose a sample and a trial plan.
Qualify the supplier, not just the sample: the third batch matters more than the first.
Request a sample