How to Achieve Special Effects with Acrylic Mediums and Additives
An acrylic medium is a substance that is added to paint to change one or more of its properties. Essentially, Acrylic mediums and additives are liquids or gels that you mix into your acrylic paint. They can help you create different effects, textures, and finishes by making the paint thinner, thicker, glossy, matte, slow-drying, textured, and more. Just another tool you can consider adding to your painting and art supply toolbox!
I'll talk about the most common acrylic mediums one by one. I'll quickly note that Mediums are incredibly versatile, and a lot of them can serve multiple purposes and you'll notice that really quickly as I talk about them.
The acrylic mediums and additives we talk about today are the following:

Gloss Medium
Matte Medium
Glazing Medium (also called Acrylic Glazing Fluid)
Gel Medium
Modeling Paste (also called Molding Paste)
Texture Gels 
Retarder
Flow Improver (also called Flow Aid)

Mediums are fun to experiment with as a painter and they can help you get unique effects in your artwork. These are optional, but I share them with you in case you've been scratching your head wondering how to get a certain effect in your art!
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