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142 Building Theatre Patronage
by the store management. This is particularly true of a cut-out mounted in a shadow box against a backing of painting or drapery.
Bases.
Cut-out bases may be made from a variety of materials, but the bases generally used are common brown wrapping paper, building (sheathing) board, cardboard, double-faced corrugated board and wallboard. Wallboard, also known as compo board, comes in a variety of makes — for instance — Upson Board (a sulphite fiber-pulp preparation already sized and primed, can be painted upon even with water colors and easily cut) — Cornell Board — Plastergon, etc. It is well to avoid those boards which have a middle layer of tar paper. This makes it more enduring where it is used for its intended purpose as a substitute for plaster walls, but the tar will greatly interfere with the use of the board for cut-outs since it will gum the teeth of the saw and make constant cleaning necessary. As this board usually is higher in price than the straight compo board, the matter of cost also is an item of importance, particularly where much is used. Avoid also the cheaper boards which have uneven texture because they are made of chips and fibers which do not cut evenly, become brittle and break and take up too much paint.
Some wallboards are given a glossy surface which makes it difficult to paint over with water colors. It is possible to obtain wallboard with a flat surface that will take either oil or water colors, but in case an emergency requires the use of the gloss surface, the defect may be overcome by sizing the wallboard with a priming of glue, by mixing soft soap and glue with the colors, or, in extreme cases, by using both.
Wallboards come in a variety of sizes and thicknesses. The following thicknesses are generally available — J/g inch, %6 inch, }/4 inch and % inch. The local dealer can supply these thicknesses. Do not use the expensive Y% inch when other thicknesses will serve the same purpose. A letter to the manufacturer will get you the service you require if the local dealer tries to give the impression that only one thickness is available.