This section is from the book "Cassell's Cyclopaedia Of Mechanics", by Paul N. Hasluck. Also available from Amazon: Cassell's Cyclopaedia Of Mechanics.
For making papier-miche mouldings as used for theatrical purposes, obtain some thick, coarse brown paper; tear it into small pieces 3 in. or 4 in. square, and soak them in cold water. Now make some good flour paste, and while hot, to half a gallon of paste add about half a pint of linseed oil and about half a pound of melted glue. Well mix these together. Now squeeze the water from the paper and paste each piece thickly on both sides, placing them one on the other to keep them moist. These pieces are taken up separately and pressed into the mould, which need not be filled level, but left hollow so long as the whole of the design is well carried out. Plaster-of-Paris is used for making the moulds. The design is first made in clay or cut in wood. Make a strong box a little larger than the model; pour into this box the wet plaster, and press in the model, having previously brushed the model over with a little sweet oil so that it will not adhere to the plaster. When the mould is hard set, line it with oiled tissue paper before pressing in the papier-mache; allow this to well set and get partially dry before turning out.
The mouldings may be fixed with needle-points and glue.
 
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