Which type of stains are known for being inexpensive and easy to use?

Romanowsky stains are well-regarded for being both inexpensive and easy to use, making them a popular choice in various cytology and hematology applications. They are versatile stains that can effectively highlight cellular components, aiding in the differentiation and identification of different cell types and abnormalities. This affordability and user-friendly nature allow laboratories, even those with limited resources, to implement them regularly in routine diagnostic procedures.

In comparison, while Papanicolau stains are widely used for cytological evaluations, particularly in cervical specimens, they can be more complex and require specific preparation techniques. New Methylene Blue stains, although useful for visualizing nucleic acids and certain cellular details, may not be as broadly applicable as Romanowsky stains. Gram stains, on the other hand, are primarily used for bacterial identification rather than cellular morphology in cytology, making them less relevant in this context. Thus, the attributes of Romanowsky stains regarding cost-effectiveness and ease of application make them the correct answer in this scenario.