If we ever discover a way to make the pigments miscible with the Gelling Agent, we will make an announcement. Foam can be made very dense and tough, if desired. This is accomplished by whipping to a lower volume. When doing this, one will need to add some time to the refining stage so as to compensate for less ammonia loss during the short whip cycle. High rise foam shrinks less than low rise foam.
All foam is a combination of foam ingredients and air.
The foam ingredients include solids and water. In high rise foam, there is a greater proportion of air, and a lesser proportion of foam ingredients. This also means that there is a lesser proportion of water. The loss of water is what causes shrinkage, so less water loss will cause less shrinkage. This causes more shrinkage.