From 69243d39d020fb30e5426304b84cc0993d5aba24 Mon Sep 17 00:00:00 2001 From: hms12 <45968885+hms12@users.noreply.github.com> Date: Fri, 5 Apr 2024 03:20:59 +0100 Subject: [PATCH] Update glossary.md More anchor points added --- _coffins/glossary.md | 27 +++++++++++++++++++++------ 1 file changed, 21 insertions(+), 6 deletions(-) diff --git a/_coffins/glossary.md b/_coffins/glossary.md index 7dddf076..5aa737f3 100644 --- a/_coffins/glossary.md +++ b/_coffins/glossary.md @@ -152,23 +152,38 @@ known as a 'ground' layer. When it has not been possible to characterise pigments fully, their elemental make up has been recorded as, for example, 'calcium-based' or 'copper-based'. ##### Egyptian blue +A manufactured pigments, prepared by firing copper minerals or metal with a calcium compound (like powdered limestone), silica and soda at high temperature. The principal colour component in Egyptian blue is calcium copper tetrasilicate (CaCuSi4O10). + ##### Egyptian green -Both are manufactured pigments, prepared by firing copper minerals or metal with a calcium compound (like powdered limestone), silica and soda at high temperature. The principal colour component in Egyptian blue is calcium copper tetrasilicate (CaCuSi4O10), and in Egyptian green is cupro-wollastonite (CaSiO3 with copper in the structure). +A manufactured pigments, prepared by firing copper minerals or metal with a calcium compound (like powdered limestone), silica and soda at high temperature. The principal colour component in Egyptian green is cupro-wollastonite (CaSiO3 with copper in the structure). ##### Malachite (Cu2CO3(OH)2) A mineral pigment, giving a pale green colour. -**Chrysocolla (Cu2H2Si2O5(OH)4)** A mineral pigment with a turquoise blue colour. +##### Chrysocolla +(Cu2H2Si2O5(OH)4) + +A mineral pigment with a turquoise blue colour. + +##### Copper-wax +Green pigments produced from the reaction of copper salts with various organic media. + +##### Copper-proteinate +See **Copper-wax** -**Copper-wax, copper-proteinate, copper carbohydrate** Green pigments produced from the reaction of copper salts with various organic media. +##### Copper carbohydrate +See **Copper-wax** -**Verdigris (copper acetate)** A copper salt that can be manufactured or found as a corrosion product. Produces a bright green colour. +##### Verdigris (copper acetate) +A copper salt that can be manufactured or found as a corrosion product. Produces a bright green colour. -**Earths** This is an umbrella term used to describe a range of pigments derived from naturally occurring deposits containing clay minerals, iron oxides and manganese oxides. They can be found in a range of shades depending on the purity and specific chemical structure of the natural sources, and can include red, yellow, orange and green pigments. The term 'earth' may be confused with ochre, which is a member of the earth pigments group, consisting of earths rich in iron oxide and iron hydroxide. Earths on ancient Egyptian objects may contain one or more of the following: +##### Earths +This is an umbrella term used to describe a range of pigments derived from naturally occurring deposits containing clay minerals, iron oxides and manganese oxides. They can be found in a range of shades depending on the purity and specific chemical structure of the natural sources, and can include red, yellow, orange and green pigments. The term 'earth' may be confused with ochre, which is a member of the earth pigments group, consisting of earths rich in iron oxide and iron hydroxide. Earths on ancient Egyptian objects may contain one or more of the following: -* **Yellow earths** The iron sulphates jarosite/natrojarosite (KFe3(OH)6(SO4)2/ NaFe3(SO4)2(OH)6), and the iron oxides goethite (α-FeO·OH) and limonite (FeO(OH)·nH2O). +###### Yellow earths + The iron sulphates jarosite/natrojarosite (KFe3(OH)6(SO4)2/ NaFe3(SO4)2(OH)6), and the iron oxides goethite (α-FeO·OH) and limonite (FeO(OH)·nH2O). * **Red earths** The iron oxides haematite (Fe2O3) and ilmenite (FeTiO3).