These baths are used to embed tissue samples in paraffin wax under vacuum. Commonly used in pathology and histology labs. The vacuum removes air from tissues so wax penetrates fully. Ensures high-quality tissue blocks for sectioning. Heated baths melt paraffin evenly. Students place samples in cassettes and lower them into the bath. Helps prevent tissue distortion. Improves clarity of microscopic sections. Essential for routine tissue processing.