New Des 50 is a concentrated preservative (50%) based on quaternary ammonium salts. It is used, in aqueous solutions, with other reagents and inert materials, for the preparation of cleaning poultices to be applied to stone surfaces and frescoes.
The most famous chemical cleaning poultice inside which New Des 50 confirms its efficacy is AB 57 (I.C.R. formulation - Rome).
PHYSICAL AND CHEMICAL PROPERTIES:
Appearance: colourless to yellow liquid
Density: 0.9 ± 0.02 kg/l at 20°C
pH: 6.5 - 8.0 in 10% aqueous solution