Just a warning as I am not sure what you are intending to hang up with shallow anchors. When we bought our first terraced house, built in 1880's we used these on the walls. It wasn't a month before most of what we had hung up ended up on the floor. The toilet roll holder, curtain rails, kitchen towel holder and so on! Being an old house the plaster wasn't in the greatest of shape and eventually the stress of use even for something as light as toilet roll caused the hole to get bigger. The only thing that stayed put really was some of the pictures. We have since taken to doing what the others advised here and drilled and anchored things that will be in use on a regular basis, into the brickwork instead. Saved a lot of frustration in the end!