01
Start timing from the specified point
Some products time from the start of application, others from completion. Confirm the rule before you begin and use a timer rather than guessing.
02
Do not extend time to cover gray hair
Exceeding the stated time may increase irritation or damage without improving coverage. Review amount, sectioning, product choice and application order instead.
03
Do not stop too early either
Rinsing early may also affect the result. If an unexpected problem interrupts the process, follow the product's safety guidance rather than pausing and resuming later.