Case & Pallet Coding
RNJet 72 / E1-140
Large, easy-to-scan lot codes and barcodes on case packs and pallets — up to 144 mm tall.
View Full SpecsCoding & Marking on Foam & Polystyrene
MEK-free ink and non-contact piezo marking for EPS/XPS foam board, insulation panels and protective packaging — won't dissolve or pit polystyrene.
Foam & Polystyrene Packaging
MEK-free ink for soft, solvent-sensitive surfaces
EPS and XPS foam, insulation board and protective packaging manufacturers need legible codes on soft, uneven surfaces that can't withstand contact printing pressure without denting, crushing or tearing — and many standard inks contain MEK (methyl ethyl ketone), a solvent that dissolves and pits polystyrene on contact.
RNJet offers a MEK-free ink formulation that prints a clean, legible code without eating into the foam surface, applied by piezo printers that mark without touching the part, from up to 15 mm away. RNJet thermal inkjet printers handle carton overwrap coding alongside it — without the daily cleaning continuous inkjet (CIJ) printers require.
EPS/XPS Foam Board
Packaging Inserts
Insulation Panels
Protective Packaging
Cartons & Cases
Pallets
Have a specific foam product or line in mind?
Tell us the substrate, line speed and code content — we'll recommend the right printer and ink.
MEK-Free Ink
Won't dissolve or pit polystyrene foam
90 m/min
Max print speed on large character piezo
430 mL
High-capacity cartridge option for long runs
No CIJ Fluids
No daily nozzle cleaning or makeup fluid
Applications
Where RNJet printers mark foam & polystyrene products
From protective inserts to insulation board, RNJet marks without touching fragile surfaces.
Recommended Printers
Matched to your substrate and line
No single printer fits every foam & polystyrene line — here's where each RNJet platform typically fits.
Direct Part Marking
RNJet 100 / 200
Piezo marking directly on metal, plastic and hard surfaces — up to 15 mm print distance, up to 36 mm tall.
View Full SpecsCarton Coding
RNJet H1 / H2
High-speed date and lot codes on cartons and flexible packaging — no daily maintenance, up to 180 m/min.
View Full SpecsHigh-Capacity Large Character
RNJet 72 XL / 140 XL
Large codes with a high-capacity 430 mL cartridge for long, continuous production runs.
View Full SpecsWhy RNJet for Foam & Polystyrene
Built for fragile surfaces & production-floor reality
MEK-Free Ink Formulation
Won't dissolve or pit polystyrene the way standard MEK-based inks can — a clean, legible code every time.
Non-Contact Printing
Piezo printers mark from up to 15 mm away, protecting soft foam surfaces from contact damage.
Large, High-Visibility Codes
Characters up to 144 mm tall stay legible on foam board and insulation panels.
Simpler Than CIJ
Cartridge or bulk ink systems with no daily nozzle cleaning or makeup fluid.
Real Print Samples
See RNJet printers in action
Actual production samples printed with RNJet TIJ and piezo printers.
Related Industries
More coding & marking applications
Pallets & Wood
View Industry Guide
Building & Construction
View Industry Guide
Ceramic
View Industry GuideFAQ
Foam & Polystyrene Coding & Marking FAQ
EPS/XPS foam board, insulation panels, packaging inserts, foam containers and coolers, and the cartons and pallets those products ship on.
No. RNJet offers a MEK-free ink formulation, so it won't dissolve or pit the polystyrene surface the way standard MEK-based inks can, and piezo printers mark without touching the surface, from up to 15 mm away, avoiding the contact pressure that can dent or crush soft foam.
Large character piezo printers like the RNJet 72 and E1-140 print up to 144 mm tall, with high-capacity 430 mL cartridges available on the XL series for long runs.
RNJet thermal inkjet and piezo printers avoid the daily cleaning, makeup fluid and nozzle maintenance that CIJ printers require, while printing comparable or higher-resolution codes.
Yes. RNJet printers mount directly on new or existing lines and trigger from a photo-eye or PLC signal without slowing production.
Request a Free Quote
Get a coding recommendation for your foam & polystyrene line
Share your product, substrate and line speed, and a RNJet USA specialist will recommend the right printer and ink.
- Free line assessment & ink recommendation
- U.S.-based support from Detroit, Michigan
- 1-year manufacturer warranty*
Request a Quote — Foam & Polystyrene
Fill out the form and our team will respond as soon as possible.