The pressure changes in fluidity refers to how the pressure changes during writing, specifically how controlled and consistent the writer is when adjusting the pressure. Consistent pressure adjustment is considered an essential aspect of fluent handwriting, although it doesn't mean the pressure has to remain constant throughout. However, excessive variation in pressure can lead to uneven handwriting and hand fatigue.
To use pressure appropriately, the child must first experience what it means to exert more or less force. In the early stages of learning, it is common for the child to apply excessive or very light pressure. The intermediate stages are discovered through the developmental process and practice.
The color indicates how the pressure changes. Red = pressure increases Blue = pressure decreases White = pressure remains constant