Application Knowledge Guide of Water-Based Glass Ink

Water-based glass ink is an environment-friendly special printing and decorating ink that adopts pure water as the dilution medium and contains no benzene or solvent. It is specially developed for the smooth and dense inert surface of glass, and is compatible with various processes such as screen printing, inkjet printing and spraying. Compared with traditional oil-based glass inks, it has outstanding advantages in environmental protection, operability and safety. It is widely applicable to the coloring, shading, decoration and functional coating of glass products in construction, home appliance, electronics, photovoltaic, craft and other fields, serving as a core material for the green upgrading of the glass deep processing industry.

1. Core Product Characteristics and Advantages

Adopting a water-based polymer resin system, water-based glass ink balances environmental protection performance and industrial applicability. Its core advantages meet the dual requirements of production and construction as well as end-use:

• Eco-friendly and Safe: Free of VOC volatile organic solvents and pungent odors, it produces no toxic and harmful gas during construction and use, complying with environmental protection production standards and indoor decoration safety requirements, and can be used for processing glass products in closed spaces. Construction equipment and screen plates can be directly cleaned with tap water, which greatly reduces the procurement cost of cleaning agents and the risk of environmental pollution.
• Wide Compatibility and Strong Operability: The viscosity can be finely adjusted with pure water, featuring simple deployment and no caking. It delivers excellent leveling performance in printing and spraying, with smooth and delicate coating, high color saturation and strong hiding power. It is compatible with all types of glass substrates including ordinary float glass, tempered glass, frosted glass and ultra-clear glass, and adapts to various molding processes.
• Stable Performance and Excellent Durability: After curing, the paint film hardness reaches 3-4H with excellent adhesion, resisting peeling and flaking. It features good acid and alkali resistance, scrub resistance, UV and weather resistance. It will not fade or yellow under long-term sunlight exposure and can resist corrosion by daily cleaning agents, meeting the durability requirements of outdoor and high-frequency usage scenarios.
• Flexible Process and Controllable Cost: It is divided into three main types: air-drying type, low-temperature baking type and high-temperature tempering type, adapting to both mass industrial production and small-batch customized processing. The air-drying type requires no large baking equipment, saving energy and improving efficiency; the high-temperature type can be cured synchronously with glass tempering, suitable for large-scale deep processing production lines.

2. Main Application Scenarios

With diversified performance advantages, water-based glass ink has been fully applied in civil, industrial, new energy and other fields, with clear segmented application scenarios as follows:

2.1 Architectural Decorative Glass Field

As the core application scenario of water-based glass ink, it is mainly used for architectural curtain wall glass, door and window glass, partition glass, background wall glass, shower room glass and so on. It can realize solid color shading, gradient frosted effect, pattern printing and privacy shielding, while providing heat insulation and anti-perspective functions. With eco-friendly and odor-free properties, it is suitable for indoor closed decoration scenarios such as home decoration, office buildings and hotels. Its excellent weather resistance meets the long-term service requirements of outdoor curtain walls and effectively resists erosion by wind, rain and ultraviolet rays.

2.2 Home Appliance and Kitchen & Bathroom Glass Field

It is widely applied to glass panels of refrigerators, ovens and range hoods, washing machine cover plates, bathroom mirrors, bathroom sliding doors and other home appliance and kitchen & bathroom accessories. Adapted to the service environment of frequent scrubbing, slight collision and kitchen oil fume corrosion of home appliances, the cured ink paint film is oil-proof, scrub-resistant and corrosion-resistant with stable color and no peeling. It is non-toxic and eco-friendly, meeting the safety testing standards of home appliance products.

2.3 3C Electronic Glass Field

It is used for shading and pattern printing of glass covers, backlight glass and decorative glass borders of mobile phones, tablets, displays and touch screens. The ink has uniform fineness and high printing accuracy, enabling high-precision fine line graphic printing. After curing, it features good insulation and strong adhesion, without affecting the light transmission and touch performance of electronic glass, meeting the process requirements of precision electronic glass production.

2.4 New Energy Photovoltaic Glass Field

It is suitable for border shading, logo printing and functional coating of photovoltaic module glass and photovoltaic backboard glass. The special photovoltaic-grade water-based glass ink has extremely strong weather resistance, anti-ultraviolet aging and high and low temperature alternating resistance. It will not pulverize or fade during long-term outdoor use, and will not affect the light transmission and power generation performance of photovoltaic glass, adapting to the stringent long-term outdoor service requirements of the new energy industry.

2.5 Craft and Daily Glass Field

It is applicable to the personalized decoration of daily and craft glass products such as glass cups, glass vases, glass ornaments, art glass paintings and glass gifts. It is flexible in process adaptation, supporting hand-painting, spraying and screen printing with bright and rich colors. The cured product is non-toxic and odor-free, complying with the safety standards of daily utensils, and suitable for small-batch customization and cultural and creative product processing.

3. Main Construction Processes and Operation Key Points

Water-based glass ink is compatible with multiple molding processes. Different processes adapt to different production scenarios, with core operation specifications as follows:

3.1 Screen Printing Process (Industrial Mainstream)

It is applicable to mass solid color printing, shading base color and fixed pattern processing, serving as the core process for architectural and home appliance glass. No complex solvent deployment is required during operation; the viscosity can be adjusted by adding an appropriate amount of pure water according to the mesh size, achieving uniform coating and neat edges after printing. Screen plates and scrapers can be directly cleaned with water after construction without ink residue, greatly improving production efficiency.

3.2 Inkjet Printing Process (Customized Scenarios)

It adapts to high-precision color patterns, gradient effects and personalized customized glass products. The special inkjet water-based glass ink has ultra-fine fineness, no precipitation and no nozzle clogging, presenting high color reduction and delicate layers in printing. It is compatible with digital printing production lines, meeting the production needs of small-batch and multi-style customization.

3.3 Spraying / Hand-painting Process (Craft Product Scenarios)

It is mostly used for art glass, niche craft products and special-shaped glass decoration. The ink has good atomization effect with flat and particle-free spraying and smooth hand-painting coloration. The dried paint film is transparent and high in texture, suitable for creative and personalized glass decoration processing.

4. Curing Methods and Process Parameters

According to different product models, water-based glass ink is divided into three curing systems to adapt to different production conditions:

• Air-drying Type: No baking required. The surface dries in about 0.5 hours at room temperature, fully dries in 12 hours, and reaches the optimal adhesion and hardness in 24 hours. It is suitable for small processing plants without baking equipment and customized craft product processing, featuring convenient operation and zero energy consumption.
• Low-temperature Baking Type: After construction, bake in an oven at 150-180℃ for 10-30 minutes for complete curing. It features fast curing speed and better paint film compactness, with significantly improved water resistance and scrub resistance, suitable for mass production of home appliance and kitchen & bathroom glass.
• High-temperature Tempering Type: It can be cured synchronously with the glass tempering process and adapts to tempered glass deep processing production lines. After high-temperature curing, its adhesion, weather resistance and impact resistance reach the highest industrial standards, applicable to high-end scenarios such as outdoor architectural curtain wall glass and photovoltaic glass.

5. Pre-construction Pretreatment (Key Quality Control Points)

The glass surface is smooth and non-porous, and the adhesion of ink completely depends on surface cleanliness. Inadequate pretreatment will easily cause problems such as ink falling, pinholes and uneven coating. The core pretreatment steps are as follows:

1. Complete Decontamination and Cleaning: Remove dust, oil stains, water stains and fingerprints on the glass surface with alcohol or special glass cleaning agents to ensure the surface is clean, dry and free of impurities. Construction with water or oil residue on the surface is prohibited.
2. Optional Activation Treatment: For ultra-smooth tempered glass, flame treatment or plasma activation treatment can be adopted to improve surface tension, significantly enhance ink adhesion and avoid later peeling problems.
3. Environmental Control: The construction environment temperature shall be controlled at 15-35℃ with humidity of 50%-80%. Avoid construction in dusty, strongly ventilated, low-temperature and high-humidity environments to prevent pinholes and uneven drying of the paint film.

6. Common Construction Problems and Solutions

7. Storage and Maintenance Specifications

• Storage Conditions: Store in a sealed, cool, dry and ventilated place with a storage temperature of 5-30℃. Avoid direct sunlight exposure and low-temperature freezing. The unopened shelf life is 12 months. Opened ink is recommended to be used up within 1 month to prevent water volatilization and pigment precipitation.
• Finished Product Maintenance: Air-drying products can be put into use and scrubbed with water only after 24 hours of curing; baking products can be used normally after cooling. Fully cured products can resist daily scrubbing and slight collision, requiring no special maintenance for long-term outdoor use.
• Waste Disposal: Residual ink can be sealed and stored for secondary use. The cleaning wastewater contains no toxic pollutants and can be treated conventionally, meeting the green production and environmental protection requirements.

8. Industry Application Summary

Against the background of stricter environmental protection policies and industrial green upgrading, water-based glass ink is gradually replacing traditional oil-based glass ink and becoming the mainstream material in the glass deep processing industry. With the multiple advantages of environmental safety, convenient construction, stable performance and controllable cost, it perfectly adapts to the full-scenario glass decoration and functional processing needs in construction, home appliance, electronics, new energy, cultural creativity and other fields. Mastering its construction process, quality control points and maintenance specifications can effectively improve the finished product quality of glass products, reduce production losses, and help enterprises realize green, efficient and high-quality production.