Archival Framing Of Canvas.

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If the painting has been created on paperboard, or on canvas mounted onto a paperboard,

the inside of the frame rabbet should be lined with an aluminum/mylar sealing film to prevent damage to the board from the acid in the wood frame.

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​Optimally, the frame rabbet should have sufficient depth to cover all of the stretcher and backing,

with the frame, not the artwork, resting against the wall.

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The frame and should protect the stretched canvas from temperature changes experienced on outside walls.

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The painting should be secured with offsets screwed into the back of the frame.

Offsets create a pressure fitting, which allows the stretcher to expand and contract separately from the frame itself.
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The stretcher should never be nailed directly into the frame.
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The hanging system should be sufficient for the weight of the framed artwork.