The core differences lie in transparency, resistance to yellowing, and toughness. Crystal resin boasts exceptional clarity—free of impurities or cloudiness—and contains UV-resistant additives that prevent it from yellowing easily; once cured, it exhibits excellent toughness and is resistant to brittleness and cracking. Ordinary resin, conversely, is typically semi-transparent or opaque; it is prone to yellowing, highly brittle, and offers poor fidelity in reproducing fine details. As such, it is better suited for simple shapes and designs, rather than for handicrafts where aesthetic appeal and durability are critical requirements.

Air bubbles are typically caused by stirring the mixture too vigorously, excessive ambient temperatures, or the improper addition of auxiliary materials. Prevention methods include: stirring slowly to minimize bubble formation; allowing the mixed resin to sit undisturbed for 5–10 minutes to allow bubbles to dissipate naturally; or preheating the mold with warm water (at approximately 40°C) before pouring the resin. When incorporating additives such as glitter or glow-in-the-dark powder, wait until the resin has thickened slightly before adding them to prevent both settling and bubble formation. If the finished product already contains a small number of bubbles, the piece can be sanded down and repaired by applying a fresh layer of resin.