How to keep poster board from warping?
I want to make a sample board to see what my wall could look like with a unique stamping technique. After painting the board it dried warped, bad. What do I do now?
Related Discussions
Blackout curtains behind vertical blinds
I have two 6' patio doors, and I want to add blackout curtains to keep the sun/cold out. What is the best way to hang them, and what can I use to push the curtains ba... See more
How to make a balloon garland?
Does anyone know how to make a balloon garland or a balloon arch?
How can I safely remove a photo that's stuck to the glass in a frame?
Occasionally I've had the problem of photos sticking to the glass inside frames. First, I'm not sure what's even causing it. I don't use any moisture when dusting the... See more
How can I make this hidden door more hidden and less hideous?
I have a hidden door though it doesn't look so hidden at the moment and I like the appeal of a hidden door. We do need to use the door, but not often. This is in a b... See more
How can we camouflage the siding in our add-on room?
We live in a mobile and have an add-on room where a covered patio used to be. Now it's part of our living space and we would like to cover or camouflage the exposed a... See more
Would someone tell me what I'm doing wrong with command strips?
First one fell off in the bathroom - okay, maybe moisture. In the kitchen - fridge, inside cabinets and on tile walls. All fall off. Everyone else seems to love them!... See more
How to hide this circuit breaker?
Entry way update. I bought a co-op and started renovating but am stumped as what to do with the entryway. The circuit breaker box is smack in the middle how the heck ... See more
You can affix it to another thin board. I used to temporarily do this on my kid's school projects before painting, then remove when dry. The water in the paint causes the paper to warp.
I would add some some 1x1 inch wood pieces to all of the edges so that it can be fully spread out with some weight. Leave it like that for awhile. Putting out in the sun and heating it just a bit can also help flatten it out (ironing by sun).
Hi! Posterboard does that. I usually tack it down or weigh it down until it's dry. Keeping it flat helps also. Then I frame it or mount it to hold it smooth. Poster frames are fairly inexpensive in stores, if you don't want to make a frame. Measure so you know what size you're going for. Good luck!
You could weight it down with heavy books or weights
I vote (this time) for the ironing by the sun. It is workable now.
Use Painters tape in the corners to keep it flat
Once you wet it there tends to be warping. Try lying it flat with books for a week or so and it should flatten out.
Hello. Water in the paint can cause the warping. You might wish to try to reflatting it using your household iron with a protect layer of parchment paper.
You might try using a piece of foam core or balsa wood instead to do your test on.
I agree, foam core board.
poster board warps on its own, just from high humidity.