This green is a kind of sea-green, of which there are upwards of twenty shades. The lighter shades, when taken out of the vat, are not washed but the silk must be worked in the hands by clapping it between them, and then be carefully opened and aired. A few threads are then washed, or rinsed; if the colour be right the whole is washed.
For the dark shades, when the weld is exhausted a little logwood is added to the liquor; in some cases, old fustic, in some annatto.
For very dark-wing or bottle-green shades, a little sulphate of iron is required.
OLIVES.
Proceed in aluming, &c. the same as for other colours; the weld liquor being stronger, some logwood must be added. When the weld and logwood are exhausted a very small quantity of each must be added, which green the liquor, when the silk being passed through, a greenish olive is produced.
A reddish olive requires fustic, instead of logwood and pearl-ash, both of these being omitted.
Fustic gives a colour commonly called drab-olive upon cloth, because generally made to match with olive, this is commonly redder than the preceding.
On dyeing silk GREY.
All the greys, namely, nut-greys, thorn-greys, black and iron-greys, and others of the same hue, black-grey excepted, are produced without aluming. The silk being washed from the soap and drained on the peg, a liquor is made of fustic, archil, logwood and sulphate of iron: fustic gives the ground, archil the red, logwood darkens, and the sulphate of iron softens all these colours, turns them grey, and, at the same time, serves instead of alum as a mordant.