Plan a trial for your application
Disperse dye pastes
Fix dye solids and grinding conditions. Compare fineness, filtration and particle growth during storage.
Dye bath dispersion stability
At target water quality and heating profile, compare specks, precipitation and filter residue.
Purchase specifications and incoming inspection
Use these properties to compare grades within the product family. Example figures refer to the cited grade or source. Confirm the offered specification, packaging and lead time in the quotation. Zhejiang Hongxin · NNO dispersing agent ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Dispersing power | Relative % | Agree for the grade and end use | Test using the same dye and reference samples agreed by buyer and supplier. |
| Inorganic salts | % by mass | Agree for the grade and end use | Distinguish sodium sulphate, other salts and total ash. |
| Filter residue | mg or grade | Agree for the grade and end use | Agree heat treatment, filter material and sample quantity. |
When approving a sample, record the grade, methods, limits and specification revision. On receipt, match the packing lot number to the lot-specific COA and record the measured values and release decision.
From samples to commercial delivery
Packaging and receiving
Store powder in moisture-resistant bags identified by grade. State the as-received active basis on the quotation.
Storage and handling
Request representative lot data on powder colour, salt content and dispersing performance. Identify damp samples separately.
Sample and order lead times
Compare quotations by active matter, as-supplied net weight and packaging. State destination and receiving facilities and request MOQ, sample dispatch and commercial arrival dates.
Questions from the plant
Why do specks appear on line despite acceptable grind fineness?
Repeat under representative high temperature and hard water. Check thermal stability and reagglomeration.
Is a dispersing-power value of 100 equivalent across suppliers?
Align the reference sample, reference dye and method before comparing.
Report a delivery or batch issue
Include the order number, lot number from the package, label photos and inspection records for the affected lot. When retesting, check Dispersing power, Inorganic salts, Filter residue.
Request documents for your application
TDS · Technical data sheet
For grade selection and sample approval, specify the grade and revision required.
SDS · Safety data sheet
Specify the country or region of use and the required language.
COA · Certificate of analysis
Request a sample COA during supplier review. For incoming inspection, provide the actual lot number.