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How do you make acrylic paint with water paint?

Published in Painting Techniques 3 mins read

It's not possible to directly make acrylic paint using water paint (watercolor). However, you can thin acrylic paint to achieve a more watercolor-like consistency.

Here's how to properly thin acrylic paint based on the provided reference:

Thinning Acrylic Paint for Watercolor Effects

While you can't create acrylic paint from watercolors, you can achieve a similar effect by thinning acrylic paint correctly. Water alone is not sufficient; you need to use a medium or retarder to help maintain the paint's integrity.

Step-by-Step Guide

  1. Combine Paint and Medium/Retarder:

    • Start by mixing your acrylic paint with either a retarder or a gel medium.
    • The recommended ratio is 80% paint to 20% medium or retarder.
  2. Thin with Water:

    • After combining the paint and medium/retarder, you can then thin the mixture with water.
    • The reference suggests adding water up to 50% of the total mixture volume.
  3. Example Calculation:

    • Let’s say you use 8ml of acrylic paint. You would then mix that with 2ml of either a retarder or a gel medium. This is the 80%/20% ratio step.
    • Your total mixture now equals 10ml. To thin this mixture with water, you would add 5ml of water to your 10ml mixture.
    • This gives a final solution of 15ml using an 80%/20% mixture ratio of paint and retarder/gel medium with an additional 50% in water.

Important Considerations

  • Why Not Just Water?: Adding water alone to acrylic paint can cause it to become too thin and lose its binding capabilities. This results in a weak and brittle paint layer.
  • Retarders: These slow down the drying time of the acrylic paint. This can be helpful for achieving blends and washes typical of watercolors.
  • Gel Mediums: These increase the transparency and flow of the acrylic paint, while still maintaining a stronger binding capability when compared to just thinning with water.
  • Experimentation: The exact proportions may vary depending on the brand of paint and desired effect. It's always best to experiment with small batches first.

Key Differences

Feature Acrylic Paint (Thinned) Watercolor
Binding Agent Acrylic polymer Gum arabic
Water Use Can be thinned with water but needs medium/retarder Uses water as its primary medium
Permanence More permanent and waterproof Less permanent, reactivates with water
Coverage Can be made more transparent but retains some opacity Generally transparent
Layering Can be layered; less prone to lifting layers. Can be layered with caution

While you can thin acrylic paint to mimic some watercolor techniques, remember that they are fundamentally different types of paint with unique properties.

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