Dissolved in this manner the annatto, if kept clean, will keep as long as you please.
To dye silk AURORA or ORANGE.
These require but twenty pounds of soap for boiling white. To dye aurora the silk must be prepared the same as for yellow.
Annatto prepared (as directed in the last article) and settled, is then put into a copper of hot water, in quantity according to the shade required; having mixed it well, the liquor being as hot as the hand will bear, put the silk into it; when one hank is tried, as in the yellow, if it be not full enough, the liquor must be strengthened till the colour is brought to the shade required. When finished the whole must be washed twice and beetled. The aurora serves as a ground for moidore.
To dye MOIDORE.
As fustic and logwood are to form part of this dye upon the annatto ground, the silk must be alumed, then washed from the alum, in order that the superflux of the alum may not render the dye uneven. A fresh liquor is then prepared, rather hot, to which must be added a little of the decoction of logwood, and of the decoction of young fustic. The silk is re-turned in this liquor, but if apparently too red, you may put in a very little of solution of sulphate of iron, which will make it sufficiently yellow.
When the silk is dyed with the gum, in the raw state, the annatto must be used nearly cold, or the elasticity of the silk will be destroyed.
Process for ORANGE.
After dyeing aurora with annatto, it is necessary to redden the annatto ground with vinegar, alum or lemon juice.