Removing a print from its backing is typically achieved by humidifying the print to soften both the backing and its adhesive.
Separating a print from its backing, especially if it's old or adhered with strong adhesives, requires careful handling to prevent damage to the print itself. The goal is to loosen the adhesive bond without tearing or weakening the paper fibers of the print.
The most common method of removal is to humidify the print to soften both the backing and its adhesive. This controlled introduction of moisture allows the paper and the adhesive to relax, making separation possible.
Controlled Humidification Technique
A precise and effective method for applying controlled humidity involves a specific setup:
- Capillary Matting: This material holds water and wicks it up slowly.
- Moisture-Permeable Membrane: Placed on top of the matting, this allows moisture vapor to pass through to the print but prevents direct contact with liquid water.
By placing the backed print face-up on this setup (with the backing in contact with or above the membrane), the moisture vapor gradually permeates the backing and the adhesive layer. As they soften, the print can often be carefully lifted or peeled away from the backing.
This humidification process should be monitored closely. The time required will vary depending on the type of paper, the adhesive used, and the thickness of the backing. Patience is crucial to avoid damaging the print. Once the adhesive is sufficiently softened, the separation should be done slowly and gently.
Removing print from backing is a task often undertaken in paper conservation to preserve the print and remove potentially harmful or acidic backing materials.
