Pigment Red 23: Practical Experience From the Manufacturing Floor

Our Real-World Approach to Pigment Red 23

Pigment Red 23, known in the industry as CI Pigment Red 23 or PR23, brings a kind of reliability that many coloring demands still require. After years of scaling up our own manufacturing lines for Pigment Red 23, we see the influence of this pigment reach into a surprising number of sectors. The main reason comes down to how PR23 delivers lasting color and practical value at a manageable cost. It stands out for the reddish blue cast, which many designers and formulators rely on in plastics, coatings, and inks. The pigment’s core composition comes from the β-naphthol family, and we pay close attention to every reaction step, optimizing yields while managing byproducts safely. Stability in shade and batch-to-batch performance depend on this diligence. Those who formulate with this pigment are not looking for marketing buzz—they want to trust the same performance next month that they saw last year.

From Raw Materials to Finished Pigment: What the Process Looks Like

Making Pigment Red 23 doesn’t just involve following a recipe. Raw materials, usually beginning with aromatic amines like 4B base and coupling components, require precise sourcing. Even a subtle change in upstream purity throws the shade off or generates unnecessary filtering headaches. Our crews monitor every dissolution, every coupling, and we filter countless samples before a batch ever reaches drying. While some newer pigment chemistries get a lot of attention, β-naphthol reds demand deep expertise on the production side. Worker experience matters as much as the equipment—miss a step, and the product suffers with chalkiness or self-flocculation later in use.

Over the years, we've learned that filtration speed, washing regimes, and drying controls shape technical properties. Pigment Red 23 is not forgiving on dispersion stability; even a cut corner on washing leaves residual salts, and then inkmakers or plastics mixers notice right away. We test every lot using grindometers for dispersion, both in water-borne and solvent-based systems. Downstream users get samples before shipments so they can check the rheology and opacity in their own lines. If we ever see shade drift or higher moisture, production halts until corrective action takes place. Feedback from customers, especially when they integrate the pigment into flexible packaging inks or toy-grade plastics, loops back into our process changes.

Specifications Grown From Field Experience

Plain specs like “C.I. 12390” or “shade: bluish red” only tell half the story. We’ve seen customers ask for D65 lightfastness, soap resistance, and specific oil absorption numbers for good reason. In actual use, the finished color can shift with variables that look small on paper but make or break a product’s success in the market. In our experience, Pigment Red 23 grade selection matters as much as coloring strength. A print ink formulator checks for dispersion in aromatic solvents; a plastics compounder looks for migration resistance and heat stability during extrusion.

We sort our offerings by commercial model numbers, which reflect both shade and end-use compatibility. Our regular PR23 lines meet mass-market needs in offset inks and water-based emulsions, while specialized batches serve more challenging environments, like PVC processing or high-speed gravure printing. Surface treatment technology, honed over time through aqueous and non-aqueous conditioning, directly affects how the pigment performs out of the bag. We could push all lots toward the tightest possible specs, but real applications, especially in flexible ink or molding, often benefit from customizing dispersibility or moisture levels.

Performance in Real Applications

Pigment Red 23 never surprises anyone who knows legacy colorants, but in the right hands, it still sets the commercial color standards for many brands. In offset lithographic inks, it balances cost, gloss, and color density. PR23 grades we produce show strong compatibility with a range of ink vehicles. Printers want strong color payoff without excess binder, so flocking and settling remain minor. Years of working with packaging converters underline just how much they value consistency in shade and viscosity, particularly in red-heavy designs where even a slight blue undertone from PR23 distinguishes between a lively magenta and a dull red-brown.

The pigment’s strong tinting strength means users need less to achieve the same chroma compared to fillers or weaker pigments. This fact translates directly to cost savings in many applications. In flexible packaging, PR23 often complements yellows or oranges to deliver special shades unobtainable with disazo colorants alone. We’ve collaborated with customers running high-speed presses, where the key concern shifts from initial shade to runnability: will the pigment hold up through a long job, or will it clog the screen and slow down production? PR23, when handled properly at the dispersion and milling stage, passes these tests.

Plastic processors look for migration control and heat stability. PR23 handles standard extrusion and injection cycles for many commodity polymers, including non-food polyethylene and polypropylene products. In some high-heat or outdoor situations, migration and fading can occur—Pigment Red 23 was never designed for automotive or weatherable grades, and we never recommend it there. For children’s toys and household items, purity and heavy metal absence remain non-negotiable. Audits from customers and international regulators regularly confirm that our PR23 meets current safety standards for EN-71 and packaging compliance, as long as end-users follow the recommended formulation limits.

Understanding PR23’s Market Role: Benefits and Gaps

Anyone with time in colorant manufacturing knows every pigment type strikes a different balance. Pigment Red 23 scores high where costs and basic shade control matter most, falling short where exposure resistance or top-end lightfastness come into play. This helps explain its enduring popularity in short-life products like flyers, short-run packaging, and children’s plastics. Technical coatings, automotive plastics, and long-term outdoor signage move away from it, seeking more robust backbones like quinacridones or perylenes. Both production footprint and market price reflect this optimization.

We see product lifecycles run their course. Decorative paints once used more PR23, but now most mainstream coatings makers pick stronger weatherfast reds. Still, producers of commercial offset inks and price-sensitive packaging remain loyal. These businesses appreciate how PR23 screens and prints, providing a familiar blue shade found nowhere else in the pigment spectrum. The relationship is not built on nostalgia—formulators return because they trust the feel, the grind, and the final look in a variety of binders and systems.

Comparisons: Pigment Red 23 vs. Other Pigment Reds

On the manufacturing side, real differences between PR23 and other red pigments appear most clearly under practical conditions. Compared to PR57:1, PR23 produces a bluer, cleaner red, especially visible in transparent plastics and clear resin systems. PR57:1, a calcium-laked variety, wins out in alcohol resistance but cannot match the tinting strength of PR23 in pure resin systems. For gravure and flexo printers, this means PR23 lays down more color using less ink, though those needing repressability in food packaging inks often lean on PR57:1 or similar types for regulatory leeway.

Quinacridone reds, like PR122, command premium positioning due to their deep shade and stellar fastness, but at a cost and handling complexity that fewer high-volume printers can afford. We compete not by mimicking these high-performance types, but by controlling every upstream variable in PR23’s synthesis and finish. In decorative paints and technical applications, the edge moves to more advanced chemistries, but cost and ease-of-dispersion arguments keep PR23 ahead in many mass-produced goods, especially for short shelf-life or price-driven projects.

Quality Commitments Earned Through Years of Manufacturing

Pigment Red 23 keeps us honest. Every time a truck leaves our gates, our name rides with it, and anything less than the right shade, dryness, or dispersion brings complaints quickly. Small multi-ton batches demand their own continuous improvement cycle. We maintain closed-loop feedback, not just with in-house QC but with dozens of converters and printers who pressure-test the pigment daily.

Audits, process reviews, and shade boards line our halls. Any drift in shade, reduction in strength, or mistake in drying temperature gets traced and corrected. Our most experienced hands, those who have spent over a decade around filtration presses and dryers, teach the newer generation that shortcuts inevitably reach the customer’s eye. Routine is vital, but curiosity changes the process—every time someone finds a better approach to handling fines or recycling mother liquors, it returns to the plant’s collective memory. Trust in the batch builds trust in the product, and between supplier and downstream partners, that’s everything.

From our view, the most effective pigment plants are not locked into set recipes. The batch records grow with each unexpected outcome, and customer complaints, rather than causing friction, prompt investigation that improves our output overall. Advising customers not just on our PR23 grades but on their grinding media, letdown procedure, or even packaging type lets everyone avoid repeat issues.

Sustainability, Safety, and Market Pressures

Years of regulatory changes affect β-naphthol pigment manufacturing. Our sector must track shifts in permissible heavy metal content, residual solvents, and workroom exposure levels. Safe handling and operator training are part of everyday life in our plant. In recent years, the attention to wastewater treatment and air emissions has sharpened. We redesign washing and filtration cycles to recover process water, treat remaining effluent, and audit suppliers for sustainable practices as well. These tasks take time and resources, but they are non-negotiable for the future of our business and the industry as a whole.

Production under ISO and REACH guidelines is now baseline—credible pigment manufacturers publicly document their compliance, not just for marketing but to prove long-term product stewardship. The push for ecological labeling, traceability, and even carbon footprinting affects which regions or customers can buy PR23 for specific end uses. In some cases, European buyers require ongoing documentation showing the supply chain meets evolving safety benchmarks, both for the raw amine and coupling agent. Our plant leadership meets regularly with regulatory teams and customer auditors, learning about requirements before they land as official rules.

What Customers Really Ask Us—And What We Tell Them

Customers want to know if the pigment handles washing tests, if the finished red resists bleeding or migration in lamination, or if the dispersant system fits their own plant’s workflow. The questions rarely concern the chemical abstract. Instead, the focus lands on downstream performance: Will this material stay stable through the next season’s raw material swings? How repeatable are the batches during hot weather or with expedited shipping? And does PR23 bring any surprises in odor, moisture content, or hidden fines that slow down their lines?

Our rule stays the same: transparency about strengths and limits. Pigment Red 23 does not solve every coloring need, but for traditional reds in everyday packaging, no other pigment matches the combined value, strength, and ease. We guide both big factories and small-batch artisans on dosage, pre-dispersion, and binder selection. In inkrooms and compounding shops, the best results come from blending our insights with theirs.

Product Evolution: Adapting to the Needs of Modern Markets

As global demand shifts, pressure increases for pigments that combine legacy benefits with improved environmental and safety profiles. In response, we have invested in equipment upgrades for cleaner batch processing and fine-tuned filtration to reduce waste. The knowledge built by past generations, who handled every drum by hand, merges with today’s need for traceability and process automation.

Development teams work alongside production crews testing new finishing agents, exploring forms of PR23 that flow better in automated dispensers or resist moisture caking. While PR23’s molecule remains unchanged, the ways we finish, blend, and pack pigment have evolved. Customer visits and hands-on troubleshooting help us fine-tune not just pigment grades but also bagging, liner type, and palletization. Bulk users need streamlined logistics just as much as reliable product.

Our commitment is straightforward: never rush a batch, never promise what the chemistry cannot support, and always back up the pigment’s real-world value with open technical support. The shape of our industry shifts with regulation, customer preferences, and cost trends, but the core experience—watching a pigment pass each real test, and seeing color prints or molded plastics head out into the world—remains steady.

Why Pigment Red 23 Continues To Matter

The story of Pigment Red 23 mirrors the changes in colorant manufacturing. We rely less on abstract formulas and more on a mix of tradition, empirical know-how, and adaptation. From raw material handling to in-plant QA, and on through to customer feedback after field use, every step shapes our understanding of what this pigment brings to users. The enduring popularity of PR23 comes from an unbroken chain of trust dating back decades, with every new challenge strengthening the links.

Pigment Red 23 may never headline a magazine for innovation, but it does anchor mass-market color production across multiple continents. Printers, compounders, and brand owners recognize the shade and trust the batch. We expect requests to evolve, standards to tighten, and regulators to push for even safer and more transparent supply chains. Our approach keeps growing from firsthand experience and honest exchange with every partner who handles this product on their own factory floors. This is the only way to keep both pigment quality and customer satisfaction on the same page.