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FT Pro, Mem SOG,'08 Cert Excellence PSA, '02 Schroeder Portrait Award Copley Soc, '99 1st Place PSA, '98 Sp Recognition Washington Soc Portrait Artists, '97 1st Prize ASOPA, '97 Best Prtfolio ASOPA
Joined: Jun 2001
Location: Peterborough, NH
Posts: 1,114
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If you are starting with a pre-primed white canvas, you have a surface with Gesso on it.
This gesso can be either acrylic based or oil based. If you have an oil based surface, you can only apply more oil based gesso or paint. If your pre-primed white canvas is acrylic based, you can choose to apply either an acrylic based or oil based substance. The rule here is never apply acrylics over oil...
If I understand your question, I assume that you are asking about the "imprimatura" i.e., a toned/colored surface on the canvas before you begin to paint.
I like to use an imprimatura on my acrylic primed linen. Sometimes I use a prepared colored gesso (Holbein) and sometimes I simply wash raw umber (acrylic or oil) over the white surface. I do not recommend that you ever add color to wet gesso.
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