Diamond painting canvases can become wrinkled or creased during shipping or storage, but there are a few methods to remove wrinkles and creases from them:
Ironing: Lay the diamond painting canvas flat with the wrinkled or creased area facing up. Place a thin cloth or paper towel over the canvas, and use a low-heat iron to gently press the fabric over the wrinkled area. Be sure not to apply too much heat or pressure, which can melt the adhesive and damage the diamonds.
Rolling: Gently roll the diamond painting canvas in the opposite direction of the wrinkles or creases, then unroll it and lay it flat. Repeat this process a few times until the wrinkles and creases are less noticeable.
Weighting: Place a heavy object, such as a book or box, on top of the wrinkled or creased area of the diamond painting canvas. Leave the weight in place overnight for a few hours, then remove it and check the canvas. Repeat this process if necessary until the wrinkles and creases are less noticeable.
It is important to note that prevention is the best method to avoid wrinkles and creases on your diamond painting canvas. Store your diamond painting canvas flat in a cool, dry place and avoid extreme temperatures or humidity exposure.