company news about Four optical dimensions affecting the curing quality of UV putty

UV-cured putty (light-cured putty) is rapidly replacing traditional putty in model making, 3D printing repair, and industrial precision repair due to its extremely fast drying speed. However, many users often encounter problems such as sticky surfaces, soft interiors, or insufficient adhesion during actual use. Behind these phenomena often lies the failure to achieve optimal balance in the four optical dimensions of the UV curing equipment. As a professional UV curing solution provider, we will provide you with an in-depth analysis of these core elements.

UV putty contains specific photoinitiators that only activate polymerization reactions when they receive light quanta of a specific wavelength.

Absorption Peak Matching: Currently, mainstream UV putty formulations on the market are primarily optimized for 365nm and 395nm.

Differences in Intensity: 365nm has higher energy and is more effective at surface drying (solving oxygen inhibition polymerization); while 395nm has relatively stronger penetration, which is beneficial for deeper curing.

From the Manufacturer's Perspective: Inferior LED beads have disordered spectra and deviated peaks, leading to insufficient initiator activity, which is the root cause of "not drying after exposure to light."

Irradiance refers to the light power received per unit area (usually expressed in mW/cm^2).

Overcoming resistance: UV putty contains a large amount of powder filler (pigment), which will intensely absorb and scatter ultraviolet rays. Only with a sufficiently high initial light intensity can the ultraviolet rays still have enough energy to reach the bottom layer of the putty after attenuation.

Distance sensitivity: Irradiance decreases rapidly with increasing distance. Professional curing equipment must have a scientific focusing system (such as a high-transmittance lens) to ensure highly concentrated energy that reaches deep into the repair area.

If intensity is the "force," then energy density is the "total amount of work done," i.e., Energy = Intensity x Time. Degree of reaction: Curing is a chemical chain reaction process. If the total irradiation time is insufficient, the molecular chain segments will not have time to fully cross-link, and the reaction will stop, resulting in the putty hardening but failing to meet mechanical properties (such as toughness and adhesion). Too much of a good thing can be bad: Insufficient energy will result in the putty being undercooked, but excessive exposure can also cause the putty to become brittle, discolor, or even deform due to the thermal effect.

This is a point often overlooked by many entry-level equipment manufacturers.

Eliminating Dead Spots: For complex-shaped repair parts, if the light is scattered and disordered, curing blind spots will appear on the sidewalls and in shadow areas.

Stress Distribution: If the light spot is extremely strong in the center and extremely weak at the edges, it will cause uneven shrinkage stress within the putty, resulting in cracks or lifting and peeling.

Professional Advantages: Industrial-grade curing lamps, through precise optical design, ensure uniform light intensity distribution within the irradiated area, allowing the entire piece of putty to cure simultaneously, resulting in a more stable structure.

To achieve laboratory-grade curing results, we recommend following the standard operating procedures:

• Spectrum Verification: Ensure the lamp wavelength perfectly matches the putty instructions.
• Layered Application: Control the thickness of each layer to within 1-2mm, using high-irradiance lamps.
• Closer to Light Source: Minimize the irradiation distance without causing extreme heat effects.
• Use Professional Lampware: Avoid low-cost counterfeit money detector lamps or nail lamps; choose professional equipment with stable drivers and optical lenses.

As a manufacturer deeply rooted in UV optical technology, we not only provide equipment but also complete curing solutions. If you have questions regarding putty curing hardness, shrinkage, or surface viscosity, please contact our technical team for comparative testing.

Shenzhen Super-curing Opto-Electronic CO., Ltd.   WhatsApp: 86-13510152819