Examples of the organic solvent are primary alcohols such as methanol, ethanol and propyl alcohol; secondary alcohols such as isopropyl alcohol; tertiary alcohols such as tertiary butanol; ketones such as acetone and methyl ethyl ketone; ethers; aliphatic, aromatic and alicyclic hydrocarbons such as benzene, toluene, xylene, chloroform, pentane, hexane and cyclohexane; and mixtures of at least two