On Thursday, 8 December 2016 17:18:22 UTC, Harry Bloomfield wrote:
Harry Bloomfield expressed precisely :
I am thinking to replace a number of (6) internal doors with a molded 6 panel
type. Will there likely be a restriction on where the door handles have to be
fitted and the hinges? I could move the existing plates in the frame and
hinge to suit and fill, but was hoping to get away with them without having
to move them to suit the new doors.

Just to clarify - these are described as 'hollow core'..

I agree with above post (Newshound)
Hollow core means they are filled with a cardboard "eggbox"

This means only suitable for indoors.
Also you can't cut them down by much, if at all, the edges may only be a couple of cm wide. So make sure your door frame is spot on.

Usually there is some indication of where solid wood blocks are fitted inside the outer skin to screw hinges, knobs and catches to.
You might have to find manufacturer's data online.