Winsell Inc.

“My molded part has air bubbles... is the colorant to blame?”

It might seem that way, but air bubbles usually point to moisture, temperature, or venting issues during the molding cycle. Still, a poorly dispersed or incompatible colorant can add to the problem. That’s why we make sure every Winsell colorant is engineered for smooth blending and consistent performance.

💡 Need help figuring out what’s really causing bubbles in your parts? We’re happy to help you troubleshoot!

Not all colors are created equal when it comes to UV resistance.

In rotational molding, pigments don’t just provide color. They play a big role in how a part weathers over time. Carbon black is one of the strongest UV stabilizers, often used in outdoor applications. Inorganic pigments like iron oxides, for example, typically hold up better against UV exposure than many organic pigments. While Organic pigments can provide bright, vibrant colors, they may fade faster without additional UV stabilizers.

Custom formulations balance aesthetics and durability, ensuring your part looks great while holding up to the sun. The right pigment choice means longer life, better appearance, and more reliable performance in the field.

At Winsell, we help molders match the right pigment and stabilizer system to the job, so your parts resist fading, chalking, and degradation outdoors.

➡️ Contact us for your custom, all-season UV formula!