What's the Best Material for Picture Frame Backing and What Holds

Hi guys! Just a quick question or two I hope someone can help me with. I'm making a last minute picture frame as a holiday gift, and I'm not sure what to use for the backing board. I'm talking about the material that holds everything in the frame, not the matte for the photo or anything like that

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What's the Best Material for Picture Frame Backing and What Holds it in Place? - General Woodworking Talk - Wood Talk Online

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