Causes:
A. Oil stains on the print's surface.
B. Insufficiently stirring of the painting solution.
C. Internal holes or pores in the prints.。
- Solutions:
A. Before painting, wipe the print's surface with alcohol.
B. During painting, stir the painting solution every 5-10 minutes.
C. Before painting, pre-coat the prints with a thin layer of transparent primer first.
Causes:
A. Insufficient staining time.
B. Temperature below requirements.
C. Material incompatibility (flexible materials and rigid materials require different varnishes).
- Solutions:
A. Extend the staining time to the recommended value.
B. Heat up to 50-60°C (Must comply with the temperature resistance of the material).
- Causes:
A. Fixing agents not used.
B. Paint fixing time too short.
C. Prints are used directly after painting, without drying.
- Solutions:
A. After painting, soak the print in a special fixing agent (such as textile fixing agent, UV fixing solution for 3D print parts) for 10 - 15 minutes.
B. After drying, set it aside for 24 hours before use.
Causes:
A. Excessive staining temperature.
B. Overlong soaking time.
- Solutions:
A. Adjust the temperature according to the temperature resistance of the material.
B. Shorten the soaking time and check every 20 minutes.
- Causes:
A. The painting solution contains impurities;
B. The print is not fully immersed.
- Solutions:
A. Before painting, filter the painting solution.
B. Ensure the material is completely immersed in the painting solution to avoid local exposure.
- Causes
A. Air intake during stirring (producing bubbles).
B. Airbrushing distance too close (≤10cm).
C. Residual oil / moisture on the print parts (Internal holes/pores in the prints may retain water inside easily.)
- Solutions:
A. When stirring the varnish, slowly stir it along the container wall for 1-2 minutes.
B. During airbrushing, maintain a distance of 15-20 cm and move at a constant speed.
C. Before coating, wipe the prints with alcohol, blow hot air (30°C) at the holes/pores to remove water inside, and leave the prints for 5-10 minutes to dry.
- Causes:
A. Single coating thickness exceeds 0.1mm.
B. Ambient temperature ＜15°C, making the varnish dry slowly.
C. Vertical airbrushing, leading to accumulation of drips.
- Solutions:
A. Apply thin coats (single thickness ≤0.05mm) 3-4 times, with 15-20 minute intervals each time.
B. Warm the environment to 20-25°C using heaters or warm lights.
C. Airbrush at a 45° angle.
- Causes:
A. Ambient humidity >60% (varnish condenses upon contact with moisture).
B. Insufficient dilution of varnish (thick consistency leads to uneven curing).
- Solutions:
A. Use a dehumidifier to control humidity at 40%-50%.
B. Add a dedicated thinner at a 1:0.2 ratio (do not use tap water).
C. If whitening has occurred, lightly sand the surface and apply a thin layer of fast-drying varnish to cover the area.
- Causes:
A. Ambient humidity >60% (varnish condenses upon contact with moisture).
B. Insufficient dilution of varnish (thick consistency leads to uneven curing).
- Solutions:
A. Use a dehumidifier to control humidity at 40%-50%.
B. Add a dedicated thinner at a 1:0.2 ratio (do not use tap water).
C. If whitening has occurred, lightly sand the surface and apply a thin layer of fast-drying varnish to cover the area.
- Causes:
A. Inconsistent spraying speed (causing uneven thickness).
B. Insufficient curing time for UV varnish (＜5 minutes).
- Solutions:
A. When airbrushing, maintain a constant speed (10-15cm per second), and do not go back and forth in the same area more than twice.
B. Expose the UV varnish to a 365nm UV light for 5-10 minutes (at a distance of 10cm), and then leave the coated print part for 24 hours to be naturally cured.
- Causes:
A. Excessive dilution of varnish (ratio >1:0.3).
B. Unstable airbrushing pressure (＜0.3MPa or ＞0.5MPa).
C. Ambient wind speed ＞2m/s (causing disruption of the coated surface).
- Solutions:
A. Adjust the dilution ratio to 1:0.1-0.2 (based on the consistency and smoothness of the varnish).
B. Stabilize the airbrush pressure at 0.3-0.5MPa.
C. Airbrush in a windless environment (e.g., enclosed balcony) and avoid direct airflow from fans.