Introduction to Staining

Question 1

Biological stains or coloring substances are prepared from dyes which may generally be divided into two categories:

Answer 1

1. Natural dyes
2. Synthetic (artificial) dyes

Question 2

Natural dyes - e.g., _______________

Answer 2

cochineal dyes
logwood dyes
vegetable extracts

Question 3

Synthetic (artificial) dyes - e.g. _________

Answer 3

aniline or coal tar dyes