Cracking

Cause 1: Post-treatment

alcohol is not completely cleaned inside the hollow or external residual resin, resulting in reaction and deformation, for the hollow parts, you should try to increase the internal cleaning time; cleaning is not done after the completion of post-curing or curing time is too long, cleaning is recommended immediately after the low medium light intensity curing for a few minutes, conditions can be done to the hollow internal curing to improve the strength and prevent the impact of moisture factors

Cause 2: Model

model hollow wall thickness is too thin (<3mm), the strength is not enough, the wall thickness should try to increase the wall thickness, while increasing the internal filling density

Cause 3: Slicing

insufficient exposure time, so that the model is not cured enough