We have no meanings for "mordant with alum" in our records yet.
1 If a bright yellow green is wanted, then mordant with alum after the indigo bath; if olive green, then mordant with chrome.
2 Mordant with alum , and dye with 1 lb.
3 Logwood, also, if mordanted with alum , gives a mauve colour; if mordanted with chrome, it gives a blue.
4 Prepare by mordanting with alum .
5 Mordant with Alum or Aluminium Acetate and dye with 40 to 50 per cent Cochineal.
6 For example:-Cochineal , if mordanted with alum , will give a crimson colour; with iron, purple; with tin, scarlet; and with chrome or copper, purple.
7 Without a mordant the colour is quite fast, but if the wool is mordanted with alum a brighter and richer colour is got.
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