hade of navy blue is dyed by mordanting with
3 lb. fluoride of chrome and 2 lb. oxalic acid, and dyeing with 3 lb.
Celestine Blue B and 3/4 lb. Diamond Black.

The Alizarine Cyanines are excellent dye-stuffs for giving dark blue
and navy blue shades on wool. They dye fairly easily, and uniform
shades are readily obtained, while they possess some considerable
penetrative power, so that they are well adapted for dyeing heavy
piece goods. The following recipes show their use and indicate the
character of the shades the various brands yield. It may be added (p. 157)
that the shades are fast to light and milling.

_Red Navy Blue_.--Mordant, 4 lb. bichromate of potash, 2 lb. tartar,
and 1-1/2 oz. sulphuric acid. Dye, 6 lb. Alizarine Cyanine R R R
double. By using a mordant of 4 lb. fluoride of chrome and 2 lb.
oxalic acid the shade is made brighter and not so red in tone.

_Dark Blue_.--A red shade of blue almost approaching a navy is
obtained by mordanting with bichromate of potash, as in the last
recipe, and dyeing with 12 lb. Alizarine Cyanine R R, or with 13 lb.
Alizarine Cyanine R. The shade with the latter dye-stuff is scarcely
so red as with the former.

_Dark Blue_.--Mordant with 4 lb. fluoride of chrome and 2 lb. oxalic
acid and dye with 13 lb. Alizarine Cyanine R.

_Dark Blue_.--A somewhat brighter and less red shade than is obtained
by working as in the last recipe is given by mordanting with 3 lb.
bichromate of potash, 2 lb. tartar, and 2-1/2 oz. sulphuric acid, and
then dyeing with 17 lb. Alizarine Cyanine G extra.

_Dark Blue_.--Mordant with 3-1/2 lb. bichromate of potash, 2 lb.
tartar, and 3 oz. sulphuric acid. Dye with 18 lb. Alizarine Cyanine
G G.

_Peacock Blue_.--Mordant with 4 lb. fluoride of chrome and 2 lb.
oxalic acid. Dye with 18 lb. Alizarine Cyanine G G.

The addition of from 2 lb. to 5 lb. acetate of ammonia in working with
the Alizarine Cyanines is a considerable advantage, by causing the
dye-stuff to penetrate the fibre better and to give more uniform
shades.

_Medium Blue_.--Mordant with 3 lb. bichromate of potash and 2 lb.
oxalic acid. Dye with 5 lb. Brilliant Alizarine Blue G, and 2 lb.
acetic acid.

_Black Blue_.--Mordant as in the last. Dye with 20 lb. Brilliant
Alizarine Blue G and 2 lb. acetic acid.

_Dark Navy_.--Mordant as in the last recipe and dye with 5 lb. (p. 158)
Alizarine Cyanine 3 R double, 5 lb. Alizarine Blue G W, 2 lb.
Brilliant Alizarine Blue G, and 2 lb. a