This is a very simple process that I was taught at art collage for stretching water colour paper. I have found that the same process works for stretching the board that I sometimes use for collages. No more annoying wrinkles or warping!
You will need
Large wooden board bigger than the piece of greyboard/paper you wish to stretch
It needs to be non-porous, I used a piece of hardwood that has been varnished.
Board or Paper
- This is best done over a sink or bath but can be done on a worktop with a bowl of water.
- Thoroughly wet the surface of the wooden board using the sponge.
- Wet one side of the greyboard and place, wet side down on the wet wooden board.
- Now you need to wet the other side of the greyboard, work quickly to avoid warping.
- Use a damp sponge to wet the gummed tape, placing a length along each edge. You can rip these to size before you start to save time.
- Not strictly necessary but I add an additional piece across each corner.
- Go over the tape and greyboard with the sponge again making sure any air pockets are removed.
- Place somewhere warm and dry. I usually leave this overnight before beginning to collage.