To Dye Blue
Fill your crucible three parts full of soft water, and put it on a slow
fire, at the same time put in your blue ingredients, previously
prepared, (this is done by dissolving the powdered blue in oil of
vitriol and water in a stopper bottle for twenty-four hours). If there
is a very light shade of blue required, put in a couple of
table-spoonfuls of the blue ingredient, and add to it as the shade may
be varied at will a
cording to the quantity of the stuff; boil the
hackles in tartar and alum, say a table-spoonful of each, or rather less
of the tartar, simmer it on the fire for two or three hours according to
the process mentioned before; and when the proper colour is produced
take out the hackles, hair, or fur, and wash them well in soap and hot
water.
There is a paste blue prepared at the dry-salters all ready for the dye
pot, take a table-spoonful of it and stir it well up in your pot nearly
full of soft water, and boil it gently for about an hour (or less), then
put in your hackles or hair, previously washed and wet going in, boil
for two hours very slowly and wash off the dye; any shade of blue may be
had in a very short time by this process; there are two or three
dry-salters in Long Acre where this paste blue is sold, and any of the
other ingredients may be purchased at their shops, or at chymists.