Wet-on-Wet Timing Calculator — Working Time Windows
Calculate working time windows for wet-on-wet watercolour technique based on paper weight, humidity and temperature.
How We Calculate This
This calculator estimates the working time windows for wet-on-wet watercolour technique by modelling how paper weight, humidity, temperature and pre-wetting method affect drying rates.
How it works
Base working times for the shine and damp phases are adjusted by factors for paper weight, humidity, temperature, paper size and pre-wetting method. Heavier paper, higher humidity and lower temperature all extend working time.
These windows are indicative estimates — actual timing varies with pigment load, paper sizing, airflow and brush wetness. Watch the paper's surface sheen as the definitive guide: paint flows freely while it shines, blends in a controlled way while it stays damp, and lifts or blooms once the sheen has gone.
Frequently Asked Questions
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Last updated: March 2026
All calculations are estimates. Always verify quantities before purchasing materials.