I decided to add some interest to my boring hallway, but wasn't sure how. I don't think I'm finished, but I have trialled and succeeded with removable wallpaper from fabric.
The fabric is 100% cotton from Japan. It's a medium thickness, but I think any reasonably thin fabric would work well. Thicker fabric might be a problem. It would be easier if the fabric fitted in one piece (for example, if I cut along the length of the fabric) but I needed to go across the fabric so the fish were swimming across. I just used two pieces for the longer stretch of wall above the fridge and matched the fish when I cut it so the join wasn't obvious. This might be more of an issue with a geometric print.
Firstly I made paste from 1L of boiling water and just under 1/4 cup of cornflour (made into a slurry with water and then whisked in). I cooked it until it thickened and would come away from the bottom of the pan when I tilted the pan and drew the whisk or a brush through it. Wait for it to cool and put it in some kind of practical container. I put the pan in the sink with cold water around it and it was cool by the time I had cut the fabric.
I cut the fabric to size and ironed it.
I put a fair slather of paste on the wall with a 5mm brush before putting up the fabric. It can be repositioned, removed, trimmed and whatever else you need while the paste is drying. i went along the top sides of the fabric again after putting it up just to make sure they were really stuck and well pasted up.