Dektol is very similar to Kodak D-19, which is commonly used to get very high contrast, continuous tone negatives. It is not a fine grain formula, but it works well for its intended purposes. It can be very useful to develop negatives for contact printing with alternative processes, like platinum or cyanotype. It is usually used for prints, for which it is excellent. For ordinary negatives, you need to get a regular negative developer, like Kodak HC-110.