Overview
The 508GS 12PL blue label (IRH2533U-1420) is Seiko’s aqueous-configured greyscale printhead. Jetting hardware is identical to the solvent/UV green-label and UV black-label versions — 508 nozzles, 71.54 mm swath, 12–84 pL greyscale — but the internal ink path, seals and materials are matched to water-based ink chemistry. It is the correct choice for textile, wallcovering and other aqueous 508GS systems.
Key Features
- 508 active nozzles across a 71.54 mm print width at 180 npi
- 12 pL base drop with multi-drop greyscale to 84 pL
- Up to 28 kHz and 320 µL/sec productivity
- Aqueous-only configuration (IRH2533U-1420, blue “508GS AQU 12” label)
- Non-wetting nozzle plate, nozzle guard and built-in damper
- Genuine Seiko heads with factory identification stickers
- Ships with the factory blue “508GS AQU 12” identification sticker
Technical Specifications
| Manufacturer | Seiko Instruments Inc. (SII Printek) |
| Model | 508GS 12PL (Blue Label, aqueous) |
| Part number | IRH2533U-1420 |
| Active nozzles | 508 |
| Print width | 71.54 mm |
| Native resolution | 180 npi (up to 720 dpi effective) |
| Drop volume | 12 pL base, multi-drop greyscale up to 84 pL |
| Grey levels | 4 |
| Firing frequency | up to 28 kHz |
| Max productivity | 320 µL/sec per head |
| Ink compatibility | Aqueous / water-based ONLY |
| Dimensions | 121 × 28.2 × 123.6 mm |
| Weight | < 300 g |
| Origin | Made in Japan |
Compatible Printers & Systems
Aqueous-ink wide-format printers using the 508GS platform: Infiniti Challenger FY-3208GS/T, FY-3266T, FY-3286T; CrystalJet 6000; Forni HS1804; Icontek TW-1800J3; Leyenda 1800T3/3200F3; Nuocai NC-SPT2531; OraJet J18; DuPont Ichinose Artistri 3320.
Frequently Asked Questions
What is the difference between IRH2533U-1420 and IRH2533U-2410?
Both are 508GS 12PL heads with identical jetting specs. The -1420 (blue label) is configured for aqueous/water-based inks only; the -2410 (black label) is for UV inks. Mixing them causes seal degradation and permanent head failure.
Can I run solvent ink through a blue-label 508GS?
No. The blue-label head is built for water-based inks only. For solvent use the green-label variant (IRH2533U, solvent/UV configuration).
Which printers use the blue-label 508GS?
Aqueous systems such as Infiniti Challenger FY-3208GS/T aqueous configurations, DuPont Ichinose Artistri 3320, Leyenda, Nuocai and other water-based 508GS platforms.
Related products: Seiko 508GS Green Label Printhead, Seiko 508GS Black Label UV Printhead, Seiko SPT1024GS Printhead — see all Seiko printheads.
