To dye silk black for velvets—To dye silk black _London process_—On dyeing cotton black at _Rouen_—To dye cotton black, _London process_—For dyeing black, particularly cotton velvets, at _Manchester_—On dyeing silk and cotton black with a blue ground—Another iron liquor—To dye cotton black by using the preceding solution—to dye cotton violet—To dye cotton red—To dye cotton an Adrianople or Turkey red—Miscellaneous observations relative to Adrianople red 105 CHAPTER VI. ON DYEING COTTON AND SILK. To dye skein cotton yellow—On dyeing and re-dyeing cotton furniture yellow—to dye cotton skein a duck's wing green and olive—Of browns, maroons, coffee colours, &c.—Observations on silk—On ungumming and boiling silk—Whitening—Sulphuring—On aluming silk—Skein silk for yellow—Preparation of annatto for aurora or orange, moidore, gold colour, and chamois—To dye silk aurora or orange—To dye moidore—Process for orange—To dye silk poppy or coquelicot—A cheaper poppy with annatto and Brazil wood—On dyeing, silk a fine crimson—Composition for dyeing silks scarlet or crimson with cochineal—Another process for crimson—Another process for crimson by Brazil wood—Of fine violet—Observations on crimson and scarlet upon silk—On dyeing silk green—On olives—On dyeing silk grey—Nut grey—Black greys—Iron greys—On dyeing silk of a Prussian blue colour—Chromate of lead for yellow on silk or cotton—Conclusion 123 Index 153 THE DYER'S GUIDE. CHAPTER I. INTRODUCTORY. _On the different branches of dyeing—On the drugs used in dyeing—On vegetable and animal substances—On substantive and adjective colours and mordants, and on the leading facts of chemical science, as connected with the art of dyeing—On the Calico-Printers' mordant for yellow and red, and on compound colours—On bleaching—On the theory of fast and fugitive colours—On dye-houses and water—Miscellaneous observations._ The trade of a Dyer is, in this country, subdivided into several distinct branches. Thus we have _woollen dyers_, who are occupied solely in the colours obtained from _cochineal_, such as _scarlet_, _crimson_, _orange_, _buff_, _&c._; likewise _purple_, or _royal purple_, obtained from _cochineal_ and _indigo_. They are called, also, _grain dyers_, from the circumstance of the colouring material, cochineal, being in small grains[2]. Yet it ought to be observed, that the term _dyed in grain_ is applied by the public generally in a very different sense, namely, to those cloths the raw material of which is dyed previously to being spun into thread, or at least before woven into cloth; and hence such dyes are usually more permanent than those which are dyed after the materials are woven into cloth. This class of dyers generally dye cloth in the piece, or a number of pieces of cloth tacked together, and worked over a winch in a suitable copper.