Sun Chemical reformulates its SolarFlex FSP range to surpass German and Swiss ink ordinances

Regulatory pressure dictates chemical engineering

The European regulatory framework is no longer just a compliance checklist; it is the primary architect of chemical formulation in the packaging industry. As brand owners face increasing scrutiny over food safety, ink manufacturers are being forced to engineer solutions that bridge the gap between legal mandates and the high-speed realities of the pressroom. The latest move by Sun Chemical illustrates this shift perfectly. On October 13, 2026, the company rolled out its next-generation SolarFlex FSP UV flexographic ink range, a direct response to the stringent requirements of the German Ink Ordinance (GIO) and the Swiss Ink Ordinance (SIO).

For converters operating in the food packaging, label, and sleeve sectors, the margin for error regarding chemical migration is practically zero. The GIO and SIO are widely considered the most rigorous frameworks in Europe for food-contact materials. By reformulating the SolarFlex FSP line to meet and surpass these standards, Sun Chemical is providing a critical safety net for packaging manufacturers who cannot afford product recalls or regulatory bottlenecks.

Balancing low migration with pressroom productivity

The technical challenge with UV flexo inks has always been balancing low migration properties with press performance. Historically, low-migration inks could compromise print speed or require excessive curing energy. Sun Chemical has addressed this operational friction. The new formulation relies on meticulously selected raw materials to ensure low migration and low odour, without sacrificing the physical properties required for high-volume converting.

Key technical parameters of the upgraded SolarFlex FSP include:

• Full compliance with GIO and SIO regulatory frameworks.
• Optimized low viscosity for consistent ink transfer.
• Fast curing capabilities tailored for modern flexo presses.
• Proven performance at printing speeds exceeding 200 meters per minute.

This last metric is particularly relevant for the converting floor. Field trials and validations conducted across key European label and packaging customers confirmed that the inks maintain their low-migration integrity and odourless profile even at speeds above 200 m/min. For plant managers, this means compliance does not come at the cost of throughput.

Expanded color gamut for modern brand demands

Furthermore, the range addresses the aesthetic demands of brand owners. Available in standard and intense four-color sets, expanded color gamut (ECG) process inks, and high-strength mono-pigmented blending colors, the system allows converters to hit precise brand targets without switching ink systems. This flexibility is crucial as the industry moves toward shorter runs and highly customized packaging designs.

The redesign of SolarFlex FSP is a clear indicator that chemical regulation is directly modifying the tools available to converters. Sun Chemical is not merely updating a product line; it is engineering a compliance mechanism that integrates seamlessly into existing production workflows.

The proactive adaptation of ink formulations to meet regional ordinances like the GIO and SIO is a necessary evolution that protects both the consumer and the converter's bottom line. Will other global regulatory bodies adopt the strict frameworks of Germany and Switzerland, forcing a universal standard for UV flexo inks? Follow The Paper for daily news, market signals and key updates from the global paper, corrugated and packaging industry. — Sigue toda la actualidad del sector en www.thepaper.ai