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Paints based on alkyd resin binders are usually solvent-borne paints, common solvents being white spirit (a mixture of saturated aliphatic and alicyclic C7-C12 A typical alkyd resin is prepared by heating for example linseed oil, phthalic acid anhydride and glycerol to obtain a fatty-acid containing polyester, as schematically shown Fig 1.1. Usually 0.1 to 1% (based on the mass of resin) of cobalt 6% type promoter is added. The exact amount of promoter added to the resin will depend on the resin used, the temperature in the workshop and the gel time desired.

A combination of DMA and cobalt promoters can be used in conjunction with MEKP to give fast cure of polyester resins.

Restoration of normal facial contour can.

Enhancement of retention not possible – lack of weight of metal base.

Certain situations demands use of acrylic denture base- 14.

Weight and bulk- Metal alloy may be cast thinner than acrylic resin and still have adequate strength.