High-solubility liquid direct dye for cotton, viscose, blended fabrics, paper and specialty finishing. Lab-tested, consistent batch-to-batch fastness.
Why choose our Direct Black 19 liquid?
- Ready-to-dilute aqueous concentrate providing even exhaustion and brilliant deep black shades on cellulosic fibers.
- Strict QC: batch COA & shade benching available on request — reduces lot-to-lot variance and re-dyeing risks.
- Technical support & lab sampling: we provide pilot scale recipes for pad-dry, exhaust and continuous processes.
- Compatibility: works well with standard leveling agents and common auxiliaries used in cotton and viscose dyeing.
Application of Direct Black 19
use for Ink,Textile printing,Paper,Paints,Plastic,Jute.
Quick use guidance
- Prepare pre-dye bath: dilute concentrate according to the TDS; maintain recommended liquor ratio.
- Auxiliaries: use leveling agent and Glauber’s salt or sodium sulfate (as per lab recipe) for even exhaustion.
- Temperature: follow pilot recipe — many cotton processes use 60–95°C profiles depending on auxiliaries.
- Post-treatment: rinse thoroughly and apply recommended fixing/softening to improve fastness.
Technical Specifications
- Product Name: Direct Black 19 liquid
- C.I. No.: 35255
- CAS No.: 6428-31-5
- Molecular Formula: C34H27N13Na2O7S2
- Molecular Weight: 839.77
- Shade: black liquid
State | liquid |
Melting point | - |
Boiling point | >100℃ |
Content | ＜40% |
PH | 7.0-10.0 |
Density | 1.05-1.20 |
Package
25KG/DRUM.
Safety, storage & compliance
Handle in accordance with available Safety Data Sheet (SDS). Store in sealed containers away from direct sunlight and extreme temperatures. Consult SDS for PPE, first-aid and disposal guidelines.
Note: The data contained here are based on our current knowledge and experience. It is the responsibility of user to test our products before the final application.
Can you supply a sample and TDS/SDS?
Yes — lab sample packs, TDS and SDS are available on request. Contact our technical team with application details.
How do I convert the powder recipe to a liquid formulation?
Liquid concentrates differ in strength — follow manufacturer TDS for dilution ratios. We can provide direct conversion support with lab recipes.
What kind of fastness can be expected?
Fastness varies with substrate and process; Direct Black 19 typically offers good wet and wash fastness on cellulosic fibers when properly fixed and post-treated. For exact ratings, request lab benching reports.
