Monday 22 October 2012

The Handyman's Pocket Book: Adhesives.

WOOD - WOOD.  For indoor woodwork Scotch glue, casein glue (though this will stain certain hardwoods - use oxalic acid to get rid of stains), synthetic resin, Polyvinyl.

For woodwork used in a humid atmosphere use synthetic resin.  Outdoor woodwork use thick paint

WOOD - METAL.  Really strong cement difficult without hot pressing.  Bostic C is often used for metal facing to plywood.  Reasonable adhesion also obtained with gold size.  Coat both metal and wood, and leave to set.  Give second coat, bring surfaces together, and cramp.  For metal inlay to wood add plaster of paris to Scotch glue, or add a tablespoonful of venice turpentine to Scotch glue.

WOOD - RUBBER.  Contact adhesive.  Motor tyre solution.  Apply to both and allow to become tacky before pressing.  Bostic C  is also a good adhesive.

WOOD - PLASTICS.  Joining surface of both wood and plastic should be coarse sanded.  Use either a contact adhesive, giving two coats with drying interval to the wood or use synthetic resin glue.  Makers of plastic sheeting also have their own adhesives.

LEATHER AND BAIZE - WOOD.  Use paper hanger's paste mixed to double strength.  Too much water may cause penetration, especially in baize.

GLASS - WOOD.  For direct adhesion use Bostic C or Durofix.  For bedding glass into wood or metal frame use Bostic C glazing compound.  For fixing small metal items to glass Seccotine is strong, providing the atmosphere is free from dampness.

GLASS-PAPER - METAL OR WOOD.  Useful for sanding discs.  Seccotine or one of the synthetic resins.  Special proprietary adhesives also available.

TILES - WOOD.  As in tiled tray.  Plaster of paris.  Add to water little at a time.  Keep stirring, and, as right consistency approaches, work quickly, flooding in and pressing down tiles immediately.  Cement and sand can be used but is heavy.

TORTOISESHELL - WOOD.  Synthetic resin or best Scotch glue freshly made.

IVORY OR BONE - METAL.  As in fixing knife blades to handles.  Melt together 1 lb. black resin and 0.25 lb. beeswax and add 4 oz. powdered brick dust.  Use hot and allow to cool.

AQUARIUM CEMENT.  Mix equal parts of moist white lead and dry red lead.  Add Japan gold size to form stiff paste.  Glass is bedded in it.  Also can be used as a glue for outdoor woodwork.

Another cement is 1 lb. ordinary putty to which 0.25 lb. red lead is added and thoroughly mixed.  Gold size is added to bring to working consistency, but mixture should be stiff.

PUTTY.  Mix whiting with linseed oil and knead well.  It can be coloured by adding powder colours such as burnt umber or Venetian red.  Preferably mix the colour with the whiting before the oil is added.

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