CALICO-PMNTING.
237
three days. If it be wished to have a thickened blue, this mixture must have poundedgum addled to it: but if not, 5 gallons of water are added. This color may be calledblue No. I.
The following table exhibits the different gradations of China blue:—
Course.
Quantity by measure ofNo. 1.
Quantity by measure ofwater or muoiiage.
No. 1
i *
0
2
ii
i
3
10
2
4
8
4
5
6
6
6
’ 4
8
7
2
10
8
2
12
9
2
14
10
2
16
11
2
18
12
2
20
I shall now give examples of working this style by the block and cylinder:—Impression of a single blue with small dots.p 0r the block, blue No. 5, thickened with starch. '
*°r the cylinder, No. 4, thickened with gum.p. Impression of two different bines with the block.
tfst blue, No. 4, with starch.ec °nd blue, No. 9, with gum.
p. Impression of three bines with the block.
o Irst blue, No. 5, with starch,scop;} blue, No. 7, with starch.
Urd blue, No. 10, with gum.
Pl&c eh P^hing-on the blues, the pieces are hung up for two days, in a dry and airyhrav n . ot too dry; then they are dipped as follows :—Three vats are mounted, whichj^ 0 0e distinguished by the numbers 1, 2, 3.
No" 9 300 pounds of lime 10*1,800 gallons of water.
3. Sl ^“tion of sulphate of iron of spec. grav. 1-048.a nd'w°. on °P caustic soda of spec. grav. 1-055; made from soda crystals, quicklime,
Tim ^ r ’ as us . ual -
in it , P lec es being suspended on the frames, are to be dipped in the first vat, and leftSeconj e , n ffi rnutes; then withdrawn, drained for five minutes; next plunged into thetnost in* m ^ or ten minutes, and drained also for five, &c. These operations will bemhgible when put into the form of a table :—
* ^*P m the 1st vat. During 10 minutes. Drain during 5 minutes.
Iu the
2
1
2
3
2
1
2
1
2
3
°Perai; ' = dl PPing of China blues, care should be taken to s g _ u itg f ram g into
a fm, 1 ’ an ^ w ben the last dip is given, the piece is to b p g immersion is
for *i, Ctl1 ’ ?a, > containing dilute sulphuric acid of spec. grav. 1 • ‘. . the alternate
PWpose of amoving the oxyde of iron, deposited upon ‘he c a hco » we hour in
te? th ? 0U * h the sulpkate of iron and lime vats. They arc *®^Xuy°l£id.
water, and finally brightened in the above dilute sulphuric acid, su n y_ u.ometi mes they -
of iso 0 . By t ^ ie
utey are subjected to a soap bath, at^becomes more lively, ®“? n e st eaduddition of nitrate of lead to the indigo vat, the throu „h the respective bat ^
Ike roller dyeing apparatus for running the pieces ?. „i ves the most ev Vf the square frames. (See Wwcihg.) But the frame-dtp .ivftud preserves the vats in good condition for a much a