View single post by Salada
 Posted: Sun Mar 30th, 2014 10:41 pm
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Joined: Mon Nov 4th, 2013
Posts: 1190
Hello James,

I've used papier mache' in the past, as suggested by Dorian, over a contour framework of cardboard & found it to very strong, light & crack free using only a flour/water paperhanging mix - practically indestructible. I gloss painted it to seal it & then applied the usual type matt water based house decorators stuff for the correct colour. Jose is correct, in my opinion, in avoiding any printed, gloss finished cardboard. I've also used papier mache' strips over roughly hill shaped scrunched up newsprint, then removed any loose scrunched up inner packing after the whole job has dried out - this needs a few days to develop maximum papier mache' strength.

If using cardboard nowadays I would add some PVA (white wood glue) to the paperhanging paste. There is a newer technique that uses a thick slurry of papier mache' as a topcoat (using a food mixer/blender to totally mash up a mix of newspaper, PVA & water - ask the Mrs first for permission !) - I believe it sets like concrete but haven't so far used it myself (too scared to ask Mrs Salada !!).

I like the idea of Herb's 'stacked contour strips' rather than your 'solid pile' of cardboard/glue which could end up on the heavy side; in fact I might try this myself.

Your foam prices seem dear to me. What sort of foam are we talking about ? The blue/pink extruded styrene stuff or the denser, aluminium foil clad isocyanate stuff ? (which is certainly a bit pricey but would make strong & lightweight scenery ). 

Regards                       Michael

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