z. cream of tartar. Dye
blue with sufficiency of indigo extract, wash and dry. Prepare a dye
bath with weld which has been previously chopped up and boiled. Enter
wool and boil for half an hour or more.

(3) GREEN FOR WOOL

Mordant with alum and cream of tartar, add to the mordanting bath a
little weld or fustic. Dye with 6 ozs. fustic (or weld). Dye in a
separate bath with indigo extract, a rather bluer green than is
wanted. Then put into a yellow bath till the right shade of green is
got.

(4) GRASS GREEN

For 1 lb. wool: 1-1/2 oz. alum, 1/2 oz. sulphuric acid, 1/2 oz. salt,
1/4 oz. Tin crystals. Dissolve tin in separate saucepan and mix half
of it with 1/4 oz. Flavin, add both to the bath together with indigo
extract (1/2 tablespoonful). When hot enter yarn and boil hard for 1
to 1-1/2 hours. It turns a green when exposed to air. Wash very
thoroughly.

(5) JADE GREEN (1 lb.)

Mordant with 1/3 oz. Cream of Tartar and 4 oz. Alum for 1/2 hour. Take
out wool and air. Cool bath a little and add half the amount of the
indigo extract to be used (according to shade of green required,
1/2 oz. indigo extract makes a good colour). Enter wool and stir
rapidly for 5 minutes or so without boiling. Take out wool. Mix in the
rest of the indigo extract. Enter wool and boil for 10 minutes. Take
out wool. Throw away a quarter of the water and add some with 3/4 oz.
fustic extract. Enter wool and boil for 1/2 hour to an hour.

CHAPTER X

THE DYEING OF COTTON

The dyeing of cotton is difficult with the natural dye stuffs, there
are only a few colours which can be said to be satisfactory. The
fastest known in earlier days was Turkey red, a long and difficult
process with madder and not very practical for the small dyer. It had
its origin in India where it is still used; red Indian cotton is one
of the fastest colours known. Catechu is another excellent cotton dye
used for various shades of brown, grey and black. A cold indigo vat is
used for blue, Indigo Extract is not used. Yellows can be got with
weld, flavin, turmeric (for which cotton has a strong attraction), and
fustic. Great care is to be taken in dyeing yellow as it is not very
fast to light. Greens may be got by dyeing in the indigo vat and then
with a yellow recipe, purples from logwood with tin mordant, but
purples and greens are unsatisfactory, and not suitable to the
vegetable dyer.

BOILING OUT

Before dyeing cotton in the raw state, or in yarn spun d