Solvent Black 27 Manufacturer in India

Solvent Black 27 — Product Overview

Solvent Black 27 is a 1:2 premetallized azo dye — the chromium complex chemistry is what sets it apart from simpler oil-soluble blacks. That premetallized structure means the metal atom is bound inside the dye molecule itself, not added separately during application. In practical terms this gives heat stability to 200°C, sustained light fastness across outdoor-exposed applications, and a black that holds its depth without migrating into adjacent materials during processing or long-term storage.

Wood finishers value it for penetrating deep into grain without leaving a surface deposit — it soaks into the wood, follows the grain, and produces a clean, even black without the milky haze you sometimes see from less soluble grades. Leather finishers and shoe polish manufacturers use it in nitrocellulose, polyurethane topcoats, and paraffin wax systems where compatibility with the carrier chemistry matters as much as the shade result. In fuel marking and petroleum product identification, YOBISOL BLACK RE is non-reactive, fully soluble in aliphatic and aromatic hydrocarbons at trace concentrations, and does not interfere with combustion or fuel handling systems. Printing ink formulators use it in gravure and flexographic inks where a pure, deep black with good film transparency is required. Batch colour strength and solubility are tested at Yobai Industries before every dispatch.

Applications

• Wood stains and furniture finishes
• Shoe polish and leather coatings
• Fuel markers and petroleum products
• Printing inks and toners
• Automotive coatings

Suitable For

• Wood
• Leather
• Plastics
• Wax & Candles
• Fuel

Key Benefits

• Deep, pure black with high tinctorial strength
• Excellent solubility in common organic solvents
• Heat-stable up to 200°C
• Good to excellent lightfastness
• No water required — no bleeding or migration

Solubility in Organic Solvents

Solvent Black 27 dissolves in a wide range of organic solvents but the premetallized structure makes it slower to dissolve than simpler azo grades — don't rush the dissolution step. For mineral spirit-based wood stains, heat the solvent to 40–50°C and add the dye slowly with continuous stirring. In aromatic systems like toluene or xylene, it dissolves more readily at ambient temperature and reaches higher concentrations.

The recommended approach for most applications is to pre-dissolve in a small quantity of aromatic solvent — toluene or xylene — to create a concentrated master batch (5–10% strength), then blend this into your mineral spirit or final formulation. This avoids undissolved particles that can cause streaking in wood stains or specks in coatings. Filter through 200-mesh screen after dissolution. For leather coatings, dissolve in the coating solvent system (MEK, butyl acetate, or toluene) before incorporating into the binder. For fuel marking, pre-dissolve in a small quantity of xylene then blend directly into the petroleum product.