Passepartout Mounting
The following method will be found useful, especially if you want to
exhibit a crayon without the expense of framing it. Lay on the mounting
board a piece of heavy manilla paper somewhat larger than the picture,
then put the crayon on this face up, next the passepartout, and last
the clean glass. Mark the size of this on the paper, and then, having
removed the glass, crayon and passepartout, cut the paper enough larger
than the marks to allow it to come up one inch all around over the
edges of the glass; next dampen the paper, and apply the starch paste
to its edges about six inches all around, then lay the crayon,
passepartout and glass back where they were on the paper, and bring the
latter up, lapping it over the face of the glass; cut the corners out
so as to bring them over properly; rub the edges down thoroughly on the
glass, and with a ruler and knife trim off the paper, allowing
one-quarter of an inch margin; then set away to dry. This will put the
crayon in good condition to be exhibited, and will thoroughly protect
it.