Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
Home › Liquid Colors › To Dye Silk Blue with Aniline
To Dye Silk Blue with Aniline
Silk is steeped first for an hour in lukewarm Liquid iquid Colors for Various clude the preparation and appliance of such Purposes. These receipts inliquid colors as are used to tinge or impart color to matter generally. Their particular uses and appliances are specified in the receipt given for each preparation. In addition to those here given, a number of other receipts water, acidulated with sulphuric acid, as for for coloring matter have been necessarily infor coloring matter have been necessarily inwoolens in the last receipt, and the color must cluded under the respective headings of the be added in 4 to 5 small portions, raising the special objects for which they are used, temperature gradually to boiling, and continuing it at that, when a good color has been obtained, for some 5 to 10 minutes. The old bath is then replaced by fresh water, which is acidified with sulphuric acid, and in which the silk is boiled for 10 minutes; after which it is thoroughly washed in water and then in suds, afterwards again in water, then once more drawn through acidulated water, and solves, forming a deep blue solution, which and will be readily found by consulting the index.