What are the differences between semi and high development?

Compensated development is used to control development in the highlights in scenes of very high contrast. There are two effective ways to obtain compensated development.

1. Use of stand development where very dilute developers are used with reduced agitation schemes.

2. Two-bath development, where the developer is divided into two parts, the reducer and the accelerator.

Both methods can be effective depending on what one is trying to achieve.