Abstract: Novel gold(I) mercaptocarboxylic acid esters of the formula (I) ##STR1## in which X is a C.sub.1 - to C.sub.3 alkylene group and Z is a group from the series tricyclo(5,2,1,0.sup.2.6)decane-8- or -9-yl or tricyclo (5,2,1,0.sup.2.6)decyl-3- or -4-methyl. These esters can be prepared from mercaptocarboxylic acid esters of the formula (II) ##STR2## and from a gold(I) chloride-dialkylsulfide complex. The novel esters can be used in gold preparations for gilding solid bases, especially ceramic materials. Compared to known gold(I) mercaptocarboxylic acid esters, the novel esters result in considerably shorter drying times for gold preparations.

Abstract: Novel gold(I) mercaptocarboxylic acid esters of the formula (I) ##STR1## in which X is a C.sub.1 - to C.sub.3 alkylene group and Z is a group from the series tricyclo(5,2,1,0.sup.2.6)decane-8- or -9-yl or tricyclo(5,2,1,0.sup.2.6)decyl-3- or -4-methyl. These esters can be prepared from mercaptocarboxylic acid esters of the formula (II) ##STR2## and from a gold(I) chloride-dialkylsulfide complex. The novel esters can be used in gold preparations for gilding solid bases, especially ceramic materials. Compared to known gold(I) mercaptocarboxylic acid esters, the novel esters result in considerably shorter drying times for gold preparations.

Abstract: The known preparation of gold(I) mercaptides by means of reacting a gold(I) halogenide dialkyl sulfide complex, obtainable from a gold(III) halogenide or gold(III) halogen complex and a sulfide, with a mercaptan can be improved if a (C.sub.1 - to C.sub.8 -)-alkyl mercapto-(C.sub.3 - to C.sub.6 -) amino acid or a water-soluble salt thereof is used as organic sulfide. The advantages of the sulfides of the invention over the previously used sulfides reside in their water solubility and insolubility in solvents and therewith in a simplification of the purification of gold(I) mercaptides independently of their structure and solubility. A further advantage of alkyl mercapto amino acids, especially D,L methionine, is their odor, which is much less than that of the (C.sub.1 -C.sub.8) alkyl sulfides previously used.

Abstract: Novel gold(I) mercaptocarboxylic acid esters of the formula (I) ##STR1## in which X is a C.sub.1 -- to C.sub.3 alkylene group and Z is a group from the series tricyclo(5,2,1,0.sup.2.6)decane-8- or -9-yl or tricyclo (5,2,1,0.sup.2.6)decyl-3- or -4-methyl. These esters can be prepared from mercaptocarboxylic acid esters of the formula (II) ##STR2## and from a gold(I) chloride-dialkylsulfide complex. The novel esters can be used in gold preparations for gilding solid bases, especially ceramic materials. Compared to known gold(I) mercaptocarboxylic acid esters, the novel esters result in considerably shorter drying times for gold preparations.

Abstract: Glossy precious-metal preparations containing of one or more organo-precious-metal compounds, an organic carrier and a fluxing agent composed of organic metal compounds are used for microwave-resistant decorations on silicate tableware, the fluxing agent contains an organic silicon compound with three hydrolyzable groups at the silicon atom in a proportion of 0.1 to 2 moles of silicon per mole of precious metal.

Abstract: In order to produce matee precious metal decorations on carriers of ceramics and porcelain, before applying bright precious metal preparations, the carrier is first provided with a base layer composed of:(a) 50 to 80% by weight of a mixture of(aa) 50 to 80% by weight of a lead-free borosilicate glazed frit with(bb) 20 to 70% by weight of titanium dioxide powder and(b) 20 to 50% by weight of a mixture of(aa) 40 to 60% by weight of a modified alkyd resin having an oil content of 20 to 40% by weight and a solid content of 40 to 60% by weight and(bb) 40 to 60% by weight of an aromatic hydrocarbon.

Abstract: A water compatible gold polish preparation is described containing gold compounds, organic carriers and flux materials wherein the organic carrier mixture is formed of 50 to 100% of 1 or more N-substituted -2-pyrrolidones and 0 to 50% of one or more water dilutable synthetic resins.