Direct Blue 297 Appearance is a blue-black uniform powder that is soluble in water.It is a substantive (direct) dye designed for cellulose fibers and other natural/synthetic blends. It gives intense, clean blue shades with good leveling and dependable performance in continuous and batch dyeing processes. Suitable for applications in textile, paper and some leather treatments where a deep, even blue is required.
TRADE NAME:Direct blend navy blue D-R,Direct Navy Blue D-R,Direct Navy Blue R,direct fast dark blue D-R
| Density | 1.60 |
| Dyeing Depth % | 2 |
| Light Fastness | - |
| Washing Fatness | 2-3 |
| Rubbing Fastness(dry) | 4 |
| Rubbing Fastness(wet) | 1-2 |
sun exposure | soaping | flooding | perspiration | rubbing | ironing | acid and alkali resistant | |||||||
standard depth | 1/12 depth | original color change | whita fiber stained | original color change | white fiber stained | original color change | white fiber stained | dry | wet | sulfuric acid | acetic acid | soda ash | |
3~4 | — | 4~5 | 4 | — | — | 4~5 | 4~5 | 4~5 | 2~3 | — | — | — | — |
Used for cellulose fiber dyeing and printing of, also suitable for polyester/cotton, polyester/stick blended a bath dyeing of step.
Direct Blue 297Used in the one-bath one-step dyeing process of polyester-cotton, polyester-bonded or cotton-nitrile blended fabrics. The dyeing of cotton and viscose fibers can be dyed in the same bath as the disperse dyes or as a direct dye. It has high directness to cellulose fiber and high dyeing rate, that is, it also has a high dye uptake rate when a small amount of inorganic salt is used. The dye solution has good stability and does not agglomerate in the dye bath at 130 ° C. The pH value of the dye bath It has a wide adaptability range and has a good dye uptake rate for cellulose fibers under acidic conditions.
As a starting lab recipe, try 1.0–2.5% owf (on weight of fabric) Direct Blue 297, liquor ratio 1:20, with mild electrolyte addition to promote exhaustion. Begin at 30–40°C and raise to 70–80°C, hold 30–60 minutes depending on depth. Always run a small-scale trial and adjust dosing, time and auxiliaries to match your fiber and machinery.
Improve wash fastness by ensuring complete rinsing after dyeing, using a mild after-fix wash and appropriate wet-fastness auxiliaries. For heavy-duty end-uses, combine optimized rinse cycles with commercial textile fixatives or levelers designed for direct dyes. pH control during washing (near neutral) also reduces dye migration.
Yes — Direct Blue 297 blends predictably with other direct blues and selected direct yellows/reds for shade modification. When mixing with other dye classes, perform compatibility tests because exhaustion and migration rates differ. Keep a master recipe log to reproduce mixed shades consistently.
Handle Direct Blue 297 using standard PPE (gloves, eye protection). Avoid discharging concentrated dye liquor to drains; follow local wastewater treatment regulations and use approved dyehouse effluent treatment. Store in sealed containers away from strong acids and extreme heat. Consult the product SDS for detailed safety and disposal instructions.
Store in a cool, dry location away from direct sunlight and strong acids. When kept sealed under recommended conditions, most direct dyes remain stable for 12–24 months; check the supplier’s batch certificate for exact shelf-life guidance.
