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Sky Blue (To pint sulphate of indigo add)

To 1 pint sulphate of indigo add 2 or 3 gallons boiling water; steep in this a piece of woolen cloth, such as an old blanket, for a day; take it out and wash in cold water.

If the sky blue is required to be light, warm some water in a vessel to about 98° Fahr., steep the woolen cloth in it for a few minutes, gallon of water used, add about 2 fluid ounces and wring out; this will leave sufficient blue bichloride (oxychloride) of tin, allow any sed- in the water to dye the silk; add 1 ounce iment to settle, and warm the clear solution; alum in solution, and work the silk in it for 20 work the silk in this for an hour or more. minutes; wring out and dry. Boil 2 pounds cochineal by suspending it in a 255. Dark Blue. If a deep blue be rebag on the surface of some water; add this to quired, blue the water as before with the a quantity of water sufficient for working the woolen cloth, add 1 ounce pearlash; then goods, and bring it to a blood heat. Wring add 1 ounce alum in solution, with a few the silk from the tin solution and work it in drops of sulphuric acid; then work the in work the silk in the cochineal solution for 1/2 hour; then let it it as before. Half an ounce of indigo extract (see No. 261. Fine Lavender. Into a vessel of 99) may be used for bluing the water, instead of using the woolen cloth for that purpose.

The exact quantity of indigo extract depends on the shade of blue required.