Acetic acid 1% aqueous

For connective tissue stains - Elastic tissue stain. Stain with a poly-acid step.

Stain results:
Nuclear chromatin: Brownish-Black
Cytoplasm: Bright Red
Erythrocytes: Orange
Muscle: Red
Collagen: Green
References:

Luna, Lee G. Histopathologic Methods and Color Atlas of Special Stains and Tissue Artifacts. Johnson Printers, Downerts Grove, IL p151-152, c 1992.

SDS