company news about How do I choose the right wavelength (365nm, 385nm, 395nm, 405nm) for my UV glue or ink?

Choosing the correct UV LED wavelength depends entirely on the photoinitiators inside your specific UV glue, resin, or ink, as well as your application's requirements for surface versus deep curing. Here is a quick guide to help you select the optimal wavelength for your Shenzhen Super-curing equipment:

1. 365nm – Best for Surface Curing & Clear Adhesives

   • Characteristics: High photon energy, shorter penetration depth.

   • Best Used For:

     • Optically clear UV glues (glass-to-glass, glass-to-metal bonding).
     • Conformal coatings on PCBs.
     • Applications requiring a tack-free, non-sticky surface finish (prevents oxygen inhibition).

   • Industry Application: Medical devices, optics, and electronics assembly.

2. 385nm / 395nm – Best for Deep Penetration & Opaque/Thick Layers

   • Characteristics: Longer wavelength, lower energy attenuation, deeper penetration into materials.

   • Best Used For:

     • Thick UV glue layers or potted electronics.
     • Pigmented UV inks, screen printing, and opaque coatings where light must pass through colors.
     • Bonding UV-stabilized plastics (like polycarbonate or acrylic) that partially block shorter UV light.

Industry Application: Industrial printing, automotive parts, plastic bonding, and wood coating.

3. 405nm – Best for Sensitive Plastics & Visible Light Curing

   • Characteristics: Borders on visible violet light, safest for heat-sensitive or UV-absorbing substrates.

   • Best Used For:

     • Specialty 3D printing resins.
     • Plastics with high UV-blocking properties.

   • Industry Application: 3D printing and specialized dental/medical manufacturing.

Always check your UV glue or ink manufacturer’s technical datasheet (TDS). It will explicitly state the peak absorption wavelength (usually 365nm or 395nm). If you are unsure, feel free to send your material specs to Shenzhen Super-curing Opto-Electronic CO., Ltd, and our engineers will provide a free curing test for you!