Many people consider fully refined paraffin wax a completely neutral carrier, believing it's only responsible for shaping, and that the color and fragrance depend entirely on the added ingredients.
Another common situation is that the paraffin wax itself is of good quality, but its compatibility with the wick, fragrance, and colorants is poor, leading to uneven burning, insufficient fragrance diffusion, or unstable color.
Truly effective fully refined paraffin wax achieves a balance between oil content, melting point, and crystallization stability, allowing the candle to maintain consistent performance from ignition to complete burning.