The manufacture of earth colours

WHITE EARTH COLOURS 87 Caustic Lime 87 Pearl White 94 Vienna White 95 Chalk 98 Precipitated Chalk 107 Calcareous Marl 110 Gypsum 111 Kaolin, Pipeclay 112 Barytes, or Heavy Spar...

RED EARTH COLOURS 151 Bole 152 Native Ferric Oxide as a Pigment 154 Iron Glance 154 Hematite 155 Raddle 155 Burnt Ferric Oxide and Ochres 158 (_a_) Burning in the Muffle 158 (_b...

THE COMMERCIAL NOMENCLATURE OF THE EARTH COLOURS 197 White Earth Colours 198 Yellow Earth Colours 200 Red Earth Colours 200 Brown Earth Colours 200 Green Earth Colours 201 Blue...

Both from the chemical and practical standpoint it is necessary to divide pigments into clearly defined groups, the following classification being adopted on the basis and natur...

The minerals constituting the raw materials for the preparation of the earth colours occur under very divergent conditions in Nature. Some of them, such as chalk, form immense d...

The preparation of the raw materials for the purpose of making earth colours is a very important matter, because many minerals or pigmentary earths merely require mechanical tre...

The white earth colours are important for the purposes of the colour-maker, because not only are they used by themselves as paints, but also serve in the production of light sha...

All the yellow earth colours, without exception, have ferric oxide as their colouring principle, the differences in shade being entirely due to the varying proportion in which t...

The number of minerals that can be directly used as red earth pigments is comparatively small, and by far the greater proportion consist of ferruginous colours, a few of which a...

In point of chemical composition, the majority of the brown earth colours are closely allied to the reds, both kinds containing ferric oxide. The main difference consists in tha...

Although the number of green-coloured minerals is large, but few of them are suitable for painters’ colours, because they occur so rarely in Nature that their employment for thi...

Only three minerals are known to be suitable as pigments; and indeed, at present, only two, the third, lapis lazuli, being now of merely historical interest. Nowadays, no one wo...

Only two minerals are known that can be used as black earth colours, namely black chalk or shale black, and blacklead or graphite. Whereas the former of these is of merely subor...

Mention has already been made of the great confusion prevailing in the nomenclature of pigments, and that many of these are put on the market under a variety of names taken from...

V.--THE GRINDING OF WHITE PIGMENTS. VI.--THE GRINDING OF EARTH PIGMENTS. VII.--THE OXIDE OF IRON PIGMENTS. VIII.--THE GRINDING OF BLACK PAINTS. IX.--THE GRINDING OF CHEMICAL COL...

Uses of Pigments: Artistic, Decorative, Protective--Methods of Application of Pigments: Pastels and Crayons, Water Colour, Tempera Painting, Fresco, Encaustic Painting, Oil-Colo...

White Lead--Zinc White--Enamel White--Whitening--Red Lead--Litharge--Vermilion--Royal Scarlet--The Chromium Greens--Chromates of Lead, Zinc, Silver and Mercury--Brunswick Green-...