Knowledge Base: Wall Printer Ink Essentials

Selecting and maintaining the right ink is the most critical factor in achieving vibrant, durable, and professional results with your wall printer. This guide covers the types of ink used, their unique properties, and essential maintenance rules to protect your equipment.

What Types of Ink Do Wall Printers Use?

Wall printing technology primarily relies on two types of ink formulations: UV-Curable Ink and Water-Based Pigment Ink.

UV-Curable Ink (The Industry Standard)

UV ink is the most popular choice for modern wall printers (like the DXonJet series) due to its incredible versatility.

  • Substrate Compatibility: Works on both porous surfaces (brick, plaster, wood) and non-porous surfaces (glass, metal, acrylic, ceramic tiles).

  • Instant Curing: Uses ultraviolet light to cure the ink in milliseconds, allowing for immediate handling of the printed surface.

Water-Based Pigment Ink

Primarily used for indoor applications on absorbent surfaces.

  • Best For: Drywall, paper, and untreated wood.

  • Limitations: Requires a porous surface to "sink into" and dry; it is generally not suitable for non-absorbent materials like glass or polished stone.

Why Choose UV Ink?

Most professional operators prefer UV ink because of its superior performance in real-world environments:

  • Versatility: One ink set for almost every surface.

  • Durability: High resistance to fading (UV stable), scratching, and chemical cleaning agents.

  • Precision: Because it cures instantly, there is no "bleeding" or feathering, resulting in sharper images and higher DPI resolution.

  • Eco-Friendly: Modern UV inks are low-VOC (Volatile Organic Compounds), making them safer for indoor environments like hospitals or schools.

The Golden Rule: Never Mix Inks

To ensure the longevity of your printhead (DoD) and the stability of your colors, follow these strict guidelines:

  • Do Not Mix Ink Types: Never put water-based ink into a system designed for UV ink, or vice versa. The chemical reactions can permanently solidify and ruin the internal ink lines.

  • Avoid Brand Mixing: Even if two inks are both "UV inks," different manufacturers use different chemical stabilizers and pigment densities. Mixing brands can lead to chemical precipitation, which clogs the nozzles and causes expensive hardware damage.

  • Switching Inks: If you must change ink brands, the entire system (tanks, tubes, dampers, and printhead) must be professionally flushed with the manufacturer-recommended cleaning solution.

Key Properties & Curing

UV ink is formulated with photoinitiators. When exposed to the printer’s UV lamp, a chemical reaction occurs that instantly transforms the liquid ink into a solid film.

  • Speed: Curing happens in milliseconds.

  • 3D Effect: Because UV ink sits on top of the surface rather than soaking in, it can be layered to create tactile, 3D textured effects.

Maintenance & Storage Tips

  • Temperature Control: Ink viscosity changes with temperature. Store your ink in a cool, dry place (usually 15°C – 30°C) to ensure consistent flow.

  • Shelf Life: Always check the expiration date. Expired ink can lose its curing properties and lead to "sticky" prints.

  • Light Protection: Since UV ink reacts to light, ensure it is kept in opaque containers and away from direct sunlight.

Summary 

Feature UV-Curable Ink Water-Based Ink
Drying Method UV Light (Instant) Evaporation/Absorption
Surface Types All (Porous & Non-Porous) Porous Only
Durability High (Scratch & Fade Resistant) Moderate
Outdoor Use Excellent Limited
Best For Commercial, Glass, Metal, Tile Indoor Murals on Drywall