문제 및 해결책
일반적인 플라스틱 재료 문제에 대한 실질적인 답변
Bottle bottom not blown open (bottom folds)
Bottle body whitening after stretching (stress whitening)
Preform whitening (crystallization)
Preform eccentricity (uneven wall thickness)
Material trapped at the product bottom (flash residue)