How can one describe the consequence of using a developer that is too hot?

Using a developer that is too hot can lead to the image appearing overdeveloped. This occurs because higher temperatures accelerate the chemical reaction between the developer and the exposed silver halide crystals in the film. As a result, the areas of the film that have been exposed to radiation develop faster and more intensely than intended. This can create an image with excessive density, where the details may become lost in areas of heavy blackening.

Overall, controlling the temperature of the developer is crucial for ensuring that the film exhibits the desired contrast and clarity. The correct temperature helps to optimally balance the development process, while an excessively hot developer skews this balance, often leading to a poor quality image that may not be useful for diagnostic purposes.