| Sample: | Yes |
|---|---|
| Transport Package: | 25kg/Bag |
| Specification: | Coloring Matter |
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Indigo naturalis extract is a concentrated mixture made by extracting (or ''pulling'') isatis indigotica's chemical constituents out of the inert plant fiber (cellulose) with a solution of grain alcohol and water. Good indigo naturalis extract should optimally preserve the aroma, taste and biological activity of isatis indigotica from which it is made.
| Item | original powder | Powder (Diffusion) |
Granule |
| Appearance | Dark blue even powder | Dark blue even powder | Dark blue even granule |
| Content (Oxidimetry)% | ≥94 | ≥93 | ≥93 |
| Particbe size (-60 mesh)% |
≥96 | ≥96 | - |
| Moisture% | ≤1.0 | ≤1.0 | ≤1.0 |
| Fe3+ | ≤500ppm | ≤300ppm | ≤200ppm |
Mainly used for dyeing cotton yarn, cotton cloth, wool or silk
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