Section
| HS Code | 247613 |
| Product Name | Fast Pink Toner RGG |
| C I Name | Pigment Red 81 |
| C I Constitution Number | 45160:1 |
| Cas Number | 12224-98-5 |
| Chemical Class | Xanthene |
| Appearance | Pink powder |
| Shade | Bright bluish pink |
| Specific Gravity | 1.5–1.7 |
| Oil Absorption | 40–50 g/100 g |
| Moisture Content | ≤1.0% |
| Ph | 6.0–8.0 |
| Water Solubility | Insoluble |
| Light Fastness | 3–4 |
| Heat Stability | 140 °C |
| Acid Resistance | 3 |
| Alkali Resistance | 3 |
| Fineness | 99% min through 325 mesh |
| Primary Applications | Printing inks, paints, textile printing |
As an accredited Fast Pink Toner RGG factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Fast Pink Toner RGG is supplied in 25 kg net-weight fiber drums with sealed, moisture-resistant inner liners for safe storage and handling. |
| Container Loading (20′ FCL) | Fast Pink Toner RGG is loaded into a 20-foot FCL container in securely sealed, labeled packages for safe ocean transport. |
| Shipping | Fast Pink Toner RGG is generally shipped as non-hazardous goods and is not regulated for normal road, rail, sea, or air transport. Use sealed, labeled containers; store in a cool, dry, ventilated area away from oxidizers and sunlight; avoid dust generation and follow SDS precautions. |
| Storage | Store Fast Pink Toner RGG in a cool, dry, well-ventilated area away from heat, sparks, open flames, and direct sunlight. Keep containers tightly closed, properly labeled, and upright. Protect from moisture and incompatible materials such as strong oxidizers and acids. Use secondary containment, avoid dust generation, and follow the SDS and local regulations. |
| Shelf Life | Shelf life: stable for 24 months from manufacture when stored in original, unopened containers in a cool, dry, well-ventilated area away from light. |
In water-based flexographic and gravure inks for untreated paper, board, and synthetic substrates, Fast Pink Toner RGG (C.I. Pigment Red 81) is dispersed as a xanthene-derived heteropolyacid lake rather than as a soluble dye, which means the dispersion stage determines both colour strength and press-side stability. The application falls under EU Directive 94/62/EC for packaging heavy-metal summations, with Pb, Cd, Hg and Cr(VI) together < 100 mg/kg, and under EuPIA Good Manufacturing Practices for non-direct food-contact inks. Addition rates in finished ink are typically 0.5–2.0 wt%; above 2.5 wt% the millbase develops shear-thinning behaviour and the finished ink may spatter on flexographic lines running at 600–800 m/min. High-shear dispersion on production scale uses a horizontal bead mill charged with 0.8–1.2 mm yttria-stabilised zirconia beads at 10–12 m/s peripheral speed and 25–40 min residence time, with the mill chamber held at 35–42 °C; the millbase is then let down with an acrylic emulsion or rosin-maleic resin solution under 8–10 m/s dissolver shear. Finished terminal products are corrugated preprint inks, paper shopping-bag flexo inks, and gravure gift-wrap inks, with grind fineness below 10 µm under ISO 1524:2013 before viscosity adjustment.
Thermal degradation of this class of lake pigments is not a sudden decomposition but a progressive shade shift caused by decomposition of the heteropolyacid counterion and degradation of the xanthene chromophore when compounded above 160 °C. In PVC plastisol, pre-dispersion in a plasticizer is the control parameter; dry mixing above 3.0 wt% leads to specking due to agglomeration. The addition ratio for vinyl toy and banner compounds is 0.5–2.0 wt% relative to total plastisol weight; for EVA footwear compound the final concentration is 0.3–1.2 wt%, with a pre-dispersed paste of 20–30 wt% in DINP. Compliance documentation is anchored to REACH (EC) No 1907/2006 for the registered grade of C.I. Pigment Red 81, Directive 2011/65/EU Annex II heavy-metal restrictions, and EN 71-3:2019+A1:2021 for migration of restricted elements in toy materials. Production dispersion of the plasticizer paste is carried out on a three-roll mill with chilled rolls at 18–22 °C, feed gap 50 µm, discharge gap 10–15 µm, and two passes; the paste is then mixed into the plastisol under vacuum at 28–32 °C to 1.5–2.0 Pa·s Brookfield viscosity. Plastisol fusion in a tunnel oven at 165–175 °C for 40–60 s completes the process for inflatable vinyl pool toys and calendered banner films. For EVA, a co-kneader or twin-screw extruder with L/D 44:1 and barrel temperature 120–145 °C is used with screw speed 180–220 rpm; injection moulding of slipper midsoles uses clamp force 80–120 t and cooling time 20–25 s. Published data for this pigment in semicrystalline engineering thermoplastics processed above 220 °C is limited, and such use is not supported by production-scale records. Long-term outdoor exposure is not appropriate because lightfastness at 0.5 wt% is typically below Blue Wool 4 under ISO 105-B02:2014.
Because screen-printing pastes for uncoated paperboard operate at high dynamic viscosity and low extension rates, the dispersion behaviour of Fast Pink Toner RGG differs from that seen in liquid flexo inks; the pigment requires high-shear dry transfer rather than low-viscosity milling. The applicable hazard labelling standard is ASTM D4236-20a for chronic health hazard evaluation of art and craft materials, while Council of Europe Resolution AP(89)1 and EU Directive 94/62/EC provide the packaging-specific requirements for non-food paper print. Addition levels of 0.8–2.5 wt% in the finished paste are typical; above 3.0 wt% the paste shows excessive tack and reduced screen-open time on 90–120 threads/cm screens. Manufacturing uses a planetary mixer for pre-dispersion at 30 rpm agitator and 600 rpm high-speed disc for 10–15 min, followed by three-roll milling with an apron gap of 10–20 µm and hydraulic pressure 6–8 MPa for 3–5 passes. The paste is then reduced with a solvent-resistant vinyl or acrylic resin varnish to print viscosity 8–12 Pa·s at 25 °C. Terminal products include point-of-purchase posters, art prints, greeting cards, and indoor gallery/event signage. Alkali resistance is insufficient for two-step screen development in aqueous resist systems; exposure to pH above 9.0 can cause partial decolouration.
When the three-roll mill gap is set below 25 µm, the pigment’s heteropolyacid lake structure is not merely wetted but shear-deaggregated; this is the necessary condition for full chroma development in gum arabic-based artist and educational watercolor formulations, but it also creates a heat-sensitive dispersion that cannot be processed through high-speed dissolvers. The regulatory basis for this application is ASTM D4236-20a for art-labeling and EN 71-3:2019+A1:2021 for migration from children’s paints. In the finished colour paste, the addition ratio is 0.5–2.0 wt% of pigment, whereas the intermediate mill base may contain 10–20 wt% pigment in a gum arabic and dextrin binder. Production process: a premix of pigment, binder, and humectant is passed through a three-roll mill at 10–15 µm gap and 18–22 °C for 3–5 passes, then let down with glycerin/dextrose humectant and a phosphate buffer to maintain pH 5.5–7.0. Terminal products are half-pan watercolours, tube gouache, and liquid poster colours for educational and craft use. Incorporation into permanent outdoor artist-grade paints is not recommended because the pigment does not meet the ASTM D4303 permanence category for fine art paints.
Unlike high-viscosity screen pastes, low-viscosity ink pad and roller stamp fluids impose a filtration stability requirement that defines the maximum particle size of the milled pigment; any undispersed aggregate above 0.45 µm will cause clogging in felt reservoirs or in marker nibs. The governing standards are EN 71-3:2019+A1:2021 for heavy-metal migration from toy inks, and ASTM D4236-20a for art material chronic hazard labelling. Addition levels in finished stamp pad inks are 0.2–1.5 wt% of pigment; final viscosity is maintained below 5 mPa·s at 25 °C, and surface tension is adjusted with a non-foaming wetting agent to 28–32 mN/m. The production process uses a pin-type bead mill with 0.3–0.4 mm yttria-stabilised zirconia beads at 10–12 m/s tip speed for 45–90 min, followed by depth filtration through a 0.45 µm polypropylene cartridge and, for marker fluids, a final 0.22 µm membrane. Terminal products are stamp pads, roller stamps, bingo daubers, and brush markers; bleed resistance is checked by a 24 h filter-paper contact test under 40 °C to ensure the pigment does not migrate from the dried mark.
In textile pigment printing pastes, the pigment is not affixed by dye-fibre substantivity but by a crosslinking acrylic or butadiene-acrylic binder film, so the main processing constraints are screen open time, binder compatibility, and cure temperature. Compliance for the finished printed article is specified via OEKO-TEX Standard 100 Annex 4 limits for heavy metals and REACH (EC) No 1907/2006 for the chemical raw material; for children’s textiles, EN 71-3:2019+A1:2021 migration limits apply if the printed fabric is incorporated into toys. Addition rates in the aqueous print paste are 1.0–3.0 wt% of pigment, with binder content 10–15 wt% of a self-crosslinking acrylic dispersion and thickener to maintain 12–18 Pa·s at 25 °C. Production mixing uses a high-shear impeller at 1,200–1,500 rpm for 10–15 min to disperse the pigment pre-dispersion into the binder paste; printing is carried out with flat or rotary screens at 60–90 threads/cm and a 65–70 Shore A squeegee. Cure is at 150–170 °C for 3–5 min. Terminal products are decorative tote bags, canvas slipcovers, indoor backdrops, and promotional textile panels. The product is not recommended for dark-colour discharge printing or peroxide-bleach post-processes because the xanthene chromophore has limited oxidative bleach resistance.
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Fast Pink Toner RGG is an organic magenta toner supplied as a free-flowing powder for solventborne liquid ink, waterborne liquid ink, paper coating, and low-temperature thermoplastic masterbatch applications. The grade is classified in the Colour Index as CI Pigment Red 81 and is produced by precipitating a Rhodamine 6G-type basic dye with complex inorganic acids, yielding a phosphotungstomolybdic acid toner. Commercial lots are controlled for volatile matter according to ISO 787-2, matter soluble in water according to ISO 787-3, oil absorption according to ISO 787-5, pH of aqueous extract according to ISO 787-9, and residue on a 45 µm sieve according to ISO 787-7. Typical lot values for the powder include moisture content below 2.0%, pH in aqueous extract between 6.0 and 8.0, oil absorption between 45 g/100 g and 55 g/100 g, and density near 2.24 g/cm³ when measured by pyknometer method ISO 787-23. The product is used where a clean, fluorescent magenta shade and high tinting strength per unit mass are required, but its thermal and photochemical limits are narrower than those of quinacridone or naphthol AS magenta pigments.
Fast Pink Toner RGG differs from CI Pigment Red 122 principally in fastness and thermal stability. In full-shade drawdowns on coated paper, the toner typically shows a blue-wool lightfastness of 4 when assessed by ISO 105-B02:2014; in 1:5 tint reduction with titanium dioxide, the rating falls to 2–3. CI Pigment Red 122, a quinacridone magenta, retains 7–8 in similar tint systems and is therefore used in weatherable industrial coatings. The fluorescence of Fast Pink Toner RGG is the main coloristic advantage: when formulated in a nitrocellulose/alcohol gravure ink at 5 wt% pigment and drawn down over optically brightened paper, the magenta exhibits higher visual brightness than CI Pigment Red 122 at equal pigment loading because the toner emits visible light in the red region under UV and blue irradiation. This property is also a limitation; the excited-state chemistry that produces fluorescence contributes to photochemical degradation in exterior exposure. Published data for this specific configuration in long-term building-product tests is limited, but the pigment class is not recommended for applications requiring service life beyond 3 years outdoors.
Particle-size distribution of the powder, determined by laser diffraction using ISO 13320-1:2020, typically places the volume-median diameter between 5 µm and 8 µm for standard lots. The powder does not require pre-drying when stored in sealed containers at relative humidity below 60%. If the storage environment exceeds 60% RH, pre-drying at 50 °C for 4 h in a vented convection oven is required before thermoplastic masterbatch extrusion to avoid moisture-induced voids and pigment agglomeration. Dispersion in liquid ink should begin with a low-shear premix stage using a Cowles-type dissolver fitted with a 150 mm to 250 mm toothed blade. Premix tip speed is maintained between 8 m/s and 12 m/s for 10 min to 20 min, because the xanthene toner agglomerates are friable but not highly shear-sensitive at room temperature.
The dispersion of Fast Pink Toner RGG in a bead mill is usually performed in horizontal pin-type or disc-type mills charged with yttria-stabilized zirconium oxide beads of 0.4 mm to 0.6 mm diameter. The bead fill fraction is maintained at 70% to 80% of the chamber volume, and the cooling jacket is supplied with water at 15 °C to 25 °C. If the mill outlet temperature exceeds 50 °C, localized thermal damage to the phosphotungstomolybdic acid complex can occur even though bulk pigment degradation begins only near 180 °C in hot-melt processing. The practical control limit in solventborne ink is therefore set well below the pigment decomposition threshold to prevent color shift, gloss loss, and increased viscosity from resin degradation. A single pass through a horizontal bead mill at 500 kg/h to 800 kg/h throughput and a residence time of 2 min to 4 min generally produces a grindometer reading below 5 µm according to ISO 1524:2020. Recirculation milling should be avoided in formulations containing nitrocellulose and high acid-value polyurethane resins because the repeated shear history accelerates resin darkening and shifts the magenta toward yellow.
In waterborne ink systems, Fast Pink Toner RGG is dispersed into acrylic and styrene-acrylic emulsions after a pigment pre-wetting step in a co-solvent such as propylene glycol monomethyl ether acetate or dipropylene glycol methyl ether. The pH of the letdown is maintained between 8.0 and 9.0. Above 9.2, the basic-dye-derived toner can undergo shade drift toward red and lose fluorescence, especially when the formulation also contains ammonia as a neutralizing agent. Amine-based additives should be avoided or limited to low levels; addition of morpholine or 2-amino-2-methyl-1-propanol above 0.5 wt% on total formulation can compete with the dye complex and alter solubility. The coloristic stability is verified by CIEDE2000 color difference against a standard letdown, using ISO 11664-4:2019; a ΔE₀₀ value below 1.0 is considered acceptable for batch release.
Fast Pink Toner RGG is used in low-density polyethylene and ethylene-vinyl acetate masterbatches where the melt temperature is kept below 170 °C to avoid shade drift. Twin-screw compounding is conducted on a corotating intermeshing extruder with a length-to-diameter ratio of 40:1 and a screw diameter of 25 mm to 75 mm, depending on line scale. The screw configuration uses two to three mild kneading blocks in the melting zone and distributive mixing elements before the die. Barrel temperatures are set from 120 °C at the feed throat to 165 °C at the die. Melt pressure at the screen pack is kept below 12 MPa, and die pressure is maintained below 5 MPa. When melt temperature exceeds 180 °C, the xanthene complex begins to decompose, producing a duller, yellower pink and reducing fluorescence; the batch is then rejected against the masterbatch shade standard. The pigment is typically introduced at 20 wt% to 40 wt% loading in a wax carrier such as polyethylene wax or EVA wax. Single-screw dilution into film-grade LDPE is then performed at 150 °C to 170 °C, with a melt-flow index measured by ISO 1133-1:2022 remaining within ±15% of the base resin specification.
The table below compares Fast Pink Toner RGG with two alternative magenta pigments used in the same broad range of ink and low-temperature thermoplastic applications. Values are representative technical-literature data rather than lot-specific certificates.
| Property | Fast Pink Toner RGG (CI Pigment Red 81) | CI Pigment Red 122 | CI Pigment Red 146 |
|---|---|---|---|
| Colour Index classification | PR81 | PR122 | PR146 |
| Chemical class | xanthene phosphotungstomolybdate | quinacridone | naphthol AS |
| Density (g/cm³) | 2.24 | 1.51 | 1.55 |
| Oil absorption (g/100 g) | 45–55 | 40–50 | 45–55 |
| Full-shade lightfastness, blue wool scale | 4 | 7–8 | 7 |
| Heat stability in HDPE (°C) | 180 | 280 | 180–200 |
| Fluorescence | present | absent | absent |
The practical difference in ink formulation is that Fast Pink Toner RGG provides a cleaner fluorescent magenta and higher tinting strength than naphthol AS types, allowing reductions in pigment loading when matching a given visual density on paper. The reduction is usually established by drawdown evaluation rather than by fixed percentage, because the magnitude depends on substrate brightness, binder type, and coating weight. In polyolefin masterbatch, the grade is chosen for low-temperature polyethylene and EVA systems only; it is not recommended for polypropylene fiber or injection-molded parts processed above 200 °C. The toner also shows limited resistance to migration in plasticized PVC, and published data for this specific configuration is limited when the plasticizer content exceeds 30 phr.
Fast Pink Toner RGG should be stored in sealed polyethylene bags inside paper drums or fiber drums at a temperature between 10 °C and 35 °C. The product should not be placed near strong oxidizing agents, concentrated acids, or open steam lines. The powder produces dust during weighing and transfer; local exhaust ventilation and particulate respirators are required where airborne dust exceeds 3 mg/m³. The lot certificate for the grade commonly reports heavy-metal screening by IEC 62321-5:2013 for lead, cadmium, mercury, and hexavalent chromium migration from dried ink films, and by IEC 62321-4:2013 for total cadmium. Typical pigment lots based on this chemistry are expected to contain lead below 100 mg/kg, cadmium below 50 mg/kg, mercury below 10 mg/kg, and hexavalent chromium below 10 mg/kg. These values are not substitutes for raw-material compliance testing under a specific regulatory framework.
Batch-to-batch variation in Fast Pink Toner RGG is most visible at the upper processing boundary. At 170 °C, shade difference against the standard is normally within ΔE₀₀ 0.8 after 5 min residence time in an LDPE matrix. At 190 °C, the same lot can shift by ΔE₀₀ 2.5 to 4.0 and lose measurable fluorescence within 10 min. Production-scale equipment behavior follows the same trend: on a 75 mm twin-screw extruder operating at 180 kg/h, thermal fluctuations of ±5 °C around the set point are sufficient to produce visible shade variation across masterbatch pellets. Therefore, the grade is not interchangeable with PR122 or PR146 in applications where the melt temperature approaches 200 °C. The difference is also apparent in injection molding of thin-wall polypropylene items: PR122 remains stable at 260 °C to 280 °C, whereas Fast Pink Toner RGG is avoided above 190 °C because the magenta dulls and the fluorescence is lost.
