BM	Blow Molding
DSC	Differential scanning calorimetry
ExtraTrees	Extremely Randomized Trees
HSI	Hyperspectral imaging
IM	Injection Molding
LightGBM	Light Gradient Boosting Machine
LOGO	Leave-One-Group-Out
MFR	Melt Flow Rate
MIR	Mid-infrared
MLP	Multilayer Perceptron
MRF	Material Recovery Facility
MSC	Multiplicative signal correction
NIR	Near-infrared
PCA	Principal Component Analysis
PE	Polyethylene
PET	Polyethylene terephthalate
PLS	Partial Least Square
PP	Polypropylene
PPWR	Packaging and Packaging Waste Regulation
RMSE	Root mean squared error
ROI	Regions of interest
SNV	Standard normal variate
SVR-Poly	Support Vector Regression-Polynomial kernel
SVR-RBF	Support Vector Regression-RBF kernel
SWIR	Shortwave infrared range
TF	Thermoforming
XGBoost	Extreme Gradient Boosting