Understanding Drying Time of Slow Drying Materials


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Table provided by Pierre Finkelstein.

These are general times to illustrate the relevancy of the different paint media. Local ambient conditions including: surface absorbency or porosity, amount of airflow, temperature and humidity levels will influence the stated times.

Utilize the system to your advantage and need. Understanding the different material mixes and how they behave will give you greater control and flexibility.

Adding Matte Medium to waterbased paint or glaze mixtures will speed up the cure time and increase the strength of the paint or glaze film.

Questions to ask yourself when deciding on the open time paint package given the ambient conditions:

Can I do the technique without the extra time?

Will what I lose up front with open time provide gains later with the ability to apply a second layer quickly?

Idea: create a scale for temperature and humidity levels to type in and a general guideline of which paint package to use will be created.

Mediums Open Time Setting Time Drying Time Curing Time

Amount of time to continuously add more materials. Can add but will make a difference, may lift. Nonmovable except with some force Fully dry and hard Reversible (beer + pigment, gouache) 2-5 min. 5 min. 5 min. 10-15 min. For use in high humidity environments Fast Drying Acrylic (Matte Medium + color) 5 min. 5-10 min. 10-15 min. 30 min. – 1 hour Acrylic Glazing Liquid 5-10 min. 10-15 min. 1-2 hours 3-5 hours Proceed (slow drying acrylics and Alkyd Glaze) 15-20 min. 30 min-1 hour 5-12 hours 12-24/48 hours For use in lower humidity environments. Oil 30 min – 1 hour 1-2 hours 2-6 hours 12-48 hours (30% Matte Medium + 30% AGL + 40% Low Viscosity) + 20% H2O 10-15 min 15-20 min. 1-2 hours 4-6 hours Pierre’s mix for classroom environments (10% Matte Medium + 40% AGL + 50% Low Viscosity) + 20% H2O 10-15 min. 20-30 min. 2-4 hours 6-12 hours Pierre’s mix

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