Category : Community Activities Posted : 08/12/2016 Price : Check with seller Location : Noida(Uttar Pradesh)
the still head was 64 C. The mixture was cooled and filtered on a Buchner funnel. The precipitate, washed on the filter with 1 liter of methanol and with 2 liters of acetone and air-dried, was 517.0 g. of gold ethyl mercaptide as a pale yellow solid containing 76.21% gold.EXAMPLE II Decorating compositions containing gold ethyl mcrcaptide used stone crushing machine. The following ingredients were milled in a roll mill to give a smooth paste containing 36.3% gold.This paste was thinned with rectified turpentine to brushing consistency and applied to an earthenware dish. When fired to 740 C. an adherent matte film was obtained that burnished well.
A liquid bright gold decorating composition containing 20% gold, 0.37% bismuth and 0.05% rhodium was prepared by mixing the following ingredients:Ingredient: Parts by weight Gold resinate dissolved in a mixture of essential oils and hydrocarbons (24% Au) lOO Rhodium resinate dissolved in a mixture of essential oils and hydrocarbons (trommel for alluvial mining) 6 Bismuth resinate dissolved in a mixture of essential oils (4.5% Bi) 10 Rectified turpentine 4 Total 120 A mixture of 9 parts by weight of this liquid bright gold and 1 part by weight of gold ethyl mercaptide was ground to a smooth paste by hand mulling to give a composition containing 25.6% gold. This paste was thinned tobrushing consistency with Canada balsam and applied to an earthenware dish. When fired to 740 C. an adherent, very slightly matte film was obtained that simulated the appearance of burnished gold. The appearance was a little brighter after burnishing.
A mixture of 8 parts by weight of the liquid bright gold described in (B) above and 2 parts by weight of gold ethyl mercaptide was ground to a smooth paste by hand mulling to give a composition containing 31.2% gold. This paste was thinned to brushing consistency with rectified turpentine and applied to an earthenware dish. When fired to 740 C. an adherent slightly matte film was obtained that closely simulated the appearance of burnished gold. Similar results were obtained with a similar composition prepared from a commercially avail able liquid bright gold. A somewhat better appearance was obtained when the mixing was done on a roll mill and the application was made mechanically, as by machine banding.