Blue Black.--For this the dye-bath is made with 8 lb. Acid Blue 1 V, 10 lb. Glauber's salt, and 2 lb. sulphuric acid, working at the boil for one hour.
Deep Navy Blue.--A very good shade is dyed with 5 lb. Acid Blue 1 V, 3 lb. Acid violet 1 V, 10 lb. Glauber's salt, and 2 lb. sulphuric acid, working at the boil for one hour.
Deep Navy.--Prepare a dye-bath with 1 lb. Fast acid Magenta B, 3 lb. Wool Blue B X, 4-3/4 oz. Orange I I, 5 lb. sulphuric acid, and 10 lb. Glauber's salt, working at the boil for one hour.
The Patent Blues work exceedingly well on wool, giving good bright shades of a fair degree of fastness. The following recipes will give some idea of the nature of the shades which may be obtained from them, while later on their use in combination with other dyes for the production of compound shades will be shown.
Bright Blue.--Prepare a dye-bath with 2 lb. Patent Blue N, or Patent Blue superior, 10 lb. Glauber's salt, and 2 lb. sulphuric acid, working at the boil for one hour.
Bright Greenish Blue.--Use 2 lb. Patent Blue V, 10 lb. Glauber's salt, and 2 lb. sulphuric acid.
Royal Blue.--Use 2 lb. Patent Blue B, or 2 lb. Patent Blue J (No. 3), 10 lb. Glauber's salt, and 2 lb. sulphuric acid. Patent Blue J (No. 3) gives slightly more violet shades than Patent Blue N, but there is not much difference between them.
Saxony Blue.--Use 2 lb. Patent Blue J (No. 00), 2 lb. sulphuric acid, and 10 lb. Glauber's salt. Patent Blue J (No. 00) dyes shades very closely resembling those dyed with indigo extract, and where the latter is used in the dyeing of compound shades the former might be substituted.
Brilliant Royal Blue.--Prepare a bath with 1-1/2 lb. New Victoria Blue B, and 10 lb. Glauber's salt. Enter at about 100° F., then raise to the boil and work for one hour. This gives a very brilliant shade of blue of a violet tone.
Sky Blue.--Prepare a dye-bath with 1-1/2 oz. New Victoria Blue B and 2 lb. Glauber's salt, working in the manner described in the last recipe.