1. Client Background
Our client, a home fragrance brand based in Canada, they sought to customize tea light candle holders that aligned with their eco-aesthetic packaging and provided a consistent glow without heat-induced distortion. They chose Mosteb for our expertise in thermal-resistant glass manufacturing, precise controls and commitment to premium craftsmanship for mass production.
2. Challenge
At first glance, making a tea light candle holder appears to be simple. However, the real challenge lies in heat distribution consistency. Tea light holders are exposed to long periods of heat when burning candles. If wall thickness is uneven, heat concentrates at specific points, causing cracks, surface stress marks or ultimately structural failure – compromising both safety and product quality.
3. Cause Analysis
Our engineering team performed a thermal flow analysis and find the main issue: Cooling and molding of inconsistent glass during high speed production. The distribution of uneven materials around the mold cavity created temperature imbalance, which later appears as internal tension lines.
To consider this, we collaborated with the customer’s production team to improve the expectations of thermal influence, guaranteeing the final design durability and aesthetic transparency.
Round Glass Candle Holder
Round Votive Candle Holders
4. Solution
- Optimized Mold Design: We re-engineered the mold geometry to achieve uniform glass flow and stable wall distribution.
- Controlled Cooling Process: A stepwise annealing process was applied to gradually remove internal stresses and increase thermal endurance.
- Material Enhancement: Borosilicate-based glass used with superior heat resistance for superior safety and clarity.
- Precise quality inspection: High-resolution optical scanning introduced to detect micro-stress areas before packaging.
5. Result
The final tea light candle holders achieved 99.5% dimensional stability and passed over 200°C continuous heating test without deformation or cracking. Customer’s candles now burn evenly with a warm, steady glow – earning positive retail feedback for both performance and beauty.
Mosteb‘s technical expertise helped the brand maintain its premium image while ensuring safety and reliability in every holder.
