OK.
Liners. These are mouldings that typically go between a frame and a painting done on a canvas or only substrate
(usually one that has no glass). From an aesthetic point of view it provides a visual step between the art and frame, much
the same way that a mount (US mat) does for a glazed picture (watercolour?). I use loads of 1" bevelled liner painted ivory.
Now it gets a tad complicated. There is a entity called a '
slip'. This is a flat piece that has no rebate. Mainly with a coved
edge but can also be bevelled or quarter rounded (bull-nose). Liners are often called slips and vice-versa.
Slips were
principally used as glass spacers. They 'slip' in between glass and a mounted picture where a mount(mat) is not used.
I should mention at this point that this is just the gospel according to me.
Call things whatever is comfortable. It's a free
country and the nomenclature police will not come down on you.
Now it gets even more confused. A
fillet is a little moulding that is much like a slip. But it has a raised section on the top edge.
Like a 4 on its back. It's not a slip and it's not a liner. Used in a similar way inside a frame but must be located more accurately
as the edge of the raised part must run in register with the inner (sight) edge of the frame. It is usually permanently fixed. Slips
and liners are generally not. Fillets are handy for extending the rebate width or adding a gold accent to a brown wood frame.
They are also widely used to edge mount(mat) bevels. Fillets are often called slips. Another thing is a spacer. Mostly just a square
piece to separate glass/art. You could say that a spacer is a technically a slip but it usually is not visible from the front.
Suppliers in their catalogues often call fillets slips and spacers fillets. In my philosophy anyway.
It's often a case of ' I hear what you say but I know what you mean'.
I knew one chap who called slip/fillets/liners/spacers 'Stretchers'.
btw. If a liner is wider than the moulding it is inside of, it is technically a 'Panel'.
