Torrecid Glazura s.r.o. - Roudnice nad Labem

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Gm - coloured mat lead glazes

The glazes serie „Gm“ are white and coloured frit, semi-raw and raw mat zinc glazes with the content of PbO 20-50% of the mass. With regard to considerably high content of lead and low chemical resistance, they are not recommended for the using to make the kitchenware.

In the art quarters, they are greatly popular for theirs noble silky mat surface with high reliability. In contradistinction to calficic mat glazes, they keep the mat in broad temperature interval 940-1100°C. At the temperatures over 1040°C, they flow down hard - above all the glazes Gm 805 91, Gm 852 91 and Gm 867 91.

The mat surface of this glazes is caused by crystallic phase of zinc silicate (willemit), that rises by the cooling of melted glaze.

They are suitable for white and in colour burny body with high thermal expansivity coefficient a > 75.10^-7 K^-1, On short body mass with a < 65.10^-7 K^-1 crackle hard as a rule.

They are engrained by colour metallic oxides and by ceramic pigments. The glazes Gm 057 91 and Gm 116 91 are not opaque wholly and they are influenced by the color of the mass.

They are suitable for all glazing techniques.

symbols: opaque, semi-transparent, transparent

Gm 057 91 colour less 25.5 % PbO	Gm 116 91 white 25.5 % PbO	Gm 182 91 white 39.0 % PbO	Gm 209 91 blue light 37.2 % PbO	Gm 234 91 blue light 31.0 % PbO
Gm 515 91 umber 31.0 % PbO	Gm 550 91 leathery brown 29.3 % PbO	Gm 805 91 metal black 46.0 % PbO	Gm 852 91 bronze black 43.5 % PbO	Gm 867 91 metal black 47.0 % PbO
Gm 919 91 yellow 44.0 % PbO	Gm 982 91 eburnean 30.0 % PbO	Gm 989 91 creamily 46.2 % PbO

symboly: opaque, semi-transparent, transparent