_Materials and Tools._--The materials and tools required are as follows: A piece of glass the size of the picture (8 by 10 inches), since no border is needed; two pieces of thin pasteboard, which may be cut from an old box cover, the same size as the glass; a generous yard of black passe-partout binding; two passe-partout rings, which cost five cents per dozen; a little photographers' paste; a sharp knife or a pair of scissors; and an awl or a pointed nail.
_The Process._--With these materials in hand it will require scarcely more than twenty minutes to complete the work. The first step is the setting of the rings. This is accomplished by punching two small holes in one of the pieces of pasteboard two inches from the edge chosen for the top and about one inch from each side. Through these holes the points of the rings are pushed until the ring is close to the pasteboard. Bending the points over in opposite directions fastens the ring firmly. This is a comparatively large picture. Had it been small--say 4 by 5 inches or smaller--only one ring in the centre, fastened about 1-1/2 inches from the edge, would have been needed.
The picture is now mounted on the second piece of pasteboard by fastening it at the upper corners with a little paste. It is desirable to use as little paste as possible. The two pieces of pasteboard are then brought together, care being taken that the rings are on the outside, and the glass laid over the picture. These parts are now ready to be bound together. The sides are bound first. This is done by cutting two pieces of the binding 1/4 of an inch longer than the short edges of the picture, wetting the gummed side and laying it along the edge of the glass so that it will lap 1/4 of an inch over the face of the glass. Each end of this binding will extend 1/8 of an inch beyond the glass. The rest of the binding is now folded over upon the pasteboard back, taking pains to draw it down close to the edge of the glass and pasteboard before it is permanently fastened. The 1/8 of an inch that projects at each end is then folded over the corner and pressed down as close as possible to the edge of the glass and pasteboard. The upper and lower edges are bound in the same way, excepting that the pieces of binding are first cut the same length as the edges over which they are to be pasted, and, before they are pasted on, the two corners on the side to be pasted to the glass are cut off 1/4 of an inch back at an angle of 45 degrees, and the other corners are also trimmed back to about 1/8 of an inch. The accompanying drawing shows more clearly how these binding strips are trimmed. The purpose of it is evident; for when the strips are pasted over the top and bottom edges of the glass, it is seen that they have been cut to give the appearance of mitred corners, and that when folded over the edges upon the back of the pasteboard no rough edges of binding are left exposed at the corners.