What is the difference between TDS and COA?
A TDS describes product technical information, while a COA normally reflects a specific batch. For Potato Starch sourcing, separate whole-potato-solids needs from thickening and binding functions first. If the project also compares Potato Flakes or Potato Granules, review viscosity method, process conditions, sample, TDS and COA separately.
Can one COA approve a supplier?
No. Supplier approval also needs factory, quality-system, consistency and application evidence. For Potato Starch sourcing, separate whole-potato-solids needs from thickening and binding functions first. If the project also compares Potato Flakes or Potato Granules, review viscosity method, process conditions, sample, TDS and COA separately.
What follows a successful sample trial?
Confirm the current specification, packing, bulk quantity, destination and required export documents. Potato Starch should be selected around viscosity, thickening, binding and process conditions rather than treated as equivalent to Potato Flakes or Potato Granules. Supplier data should also be compared under equivalent test methods.
Can viscosity numbers from different Potato Starch suppliers be compared directly?
Only when concentration, temperature programme, instrument, speed and test method are comparable. Buyer approval should also include sample behaviour in the actual formulation. For China Potato Flour sourcing, start from the finished food and process, then define whether Potato Flakes or Potato Granules should enter the first trial. Keep the approved sample, specification, TDS, COA and quotation aligned to the same grade.
Can we request a sample, TDS and COA before a bulk order?
Yes. After the exact product direction is defined, discuss the sample and applicable technical documents together. Share the finished food, key process, target performance and expected volume so the sample grade, TDS, COA and quotation refer to the same sourcing project.
What information helps us receive a more accurate quotation?
Provide the product or application, expected volume, packing, destination country or port and the preferred trade term such as FOB, CFR or CIF. Add any technical, certification or labelling requirements before quotation. For China Potato Flour sourcing, start from the finished food and process, then define whether Potato Flakes or Potato Granules should enter the first trial. Keep the approved sample, specification, TDS, COA and quotation aligned to the same grade.