Gomori's Aldehyde Fuchsin 2-2. Staining solution is good for about 4 weeks at room temperature and for over 6 months in the refrigerator.
Fresh solutions stain quicker than used ones.
Treat all slides in Lugol's iodine for 10-60 minutes. Bleach in sodium bisulfite for 30 seconds. Rinse in distilled water for 2 minutes. Rinse in distilled water. Plastic background stain is intense, but should be regarded as only a superficial nuisance as it does not affect the tissue components.