Scientific amusements . ron,produces Ink, for the gall-nut con-tains a quantity of the acid. Allthe .black inks in use generally arecomposed of green vitriol (sulphateof iron) in union with some astrin-gent vegetable matter; the best isthe gall-nut, although, for cheap-ness, logwood and oak bark haveeach been used. An excellent blackink may be made by putting into a Unhairing .he hide. gallon stone bottle twelve ounces of bruised galls, sixounces of green vitriol, and six of common gum, andfilling up the bottle with rain water ; this should be keptthree or four weeks before using, shaking the
Scientific amusements . ron,produces Ink, for the gall-nut con-tains a quantity of the acid. Allthe .black inks in use generally arecomposed of green vitriol (sulphateof iron) in union with some astrin-gent vegetable matter; the best isthe gall-nut, although, for cheap-ness, logwood and oak bark haveeach been used. An excellent blackink may be made by putting into a Unhairing .he hide. gallon stone bottle twelve ounces of bruised galls, sixounces of green vitriol, and six of common gum, andfilling up the bottle with rain water ; this should be keptthree or four weeks before using, shaking the bottle fromtime to time. Blue ink has lately been much used ; it is made bydissolving newly-formed Prussian blue in a solution ofoxalic acid. To make it, dissolve some yellow prussiateof potash in water in one vessel, and some sulphate of ironin another, adding a few drops of nitric acid to the sulphateof iron; now mix the two liquids, and a magnificent bluecolour will appear, in the form of a light sediment; this is 12. 168 CHEMISTRY. to be put upon a paper filter, and well washed by pouringover it warm water, and allowing it to run through ; awarm solution of oxalic acid should now be mixed withit, and the Prussian blue will dissolve into a bright blueink. Red ink is made by boiling chips or raspings of Brazilwood in vinegar, and adding a little alum and gum ; itkeeps well, and is of a good colour. A red ink of morebeautiful appearance, but not so durable, may be made bydissolving a few grains of carmine in two or three tea-spoonfuls of spirit of hartshorn.
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Keywords: ., bookcentury1800, bookdecade189, booksubjectscientificrecreations
