1). Yellow for Silk.
Scour the silk in the proportion of 20 lbs. soap to 100 lbs. of silk. Afterwards alum and wash. A bath is made of 2 parts weld for 1 of silk, and after ¼ hour's boiling, it is filtered through a cloth into another bath. When this bath is cooled a little, the silk is immersed and turned about till dyed. The weld is in the meantime boiled up again with a little pearl ash, and after being strained, it is added to the first bath (part of the first bath having been thrown away) until the desired colour is got. The bath must not be too hot. If more golden yellows are wanted, add some annotto to the second bath.
2). Yellow for Cotton.
Scour the cotton in a lixivium of wood ashes, wash and dry. It is alumed with ¼ of its weight of alum. After 24 hours it is taken out of the bath and dried without washing. A weld bath is prepared with 1¼ parts weld to 1 of cotton, and the cotton dipped in till the shade is got. It is then worked in a bath of sulphate of copper (¼ copper to 1 of cotton) for 1½ hours. It is next thrown, without washing, into a boiling solution of white soap (¼ soap to 1 cotton). It is boiled for 1 hour, then washed and dried.
3). Deep Yellow for Cotton or Linen.
2½ parts of weld for 1 of cotton, with a little copper sulphate added to the bath. The cotton is well worked in this till the cotton has the desired colour. It is then taken out and a little soda ley is poured in. It is returned and worked in this for ¼ hour, then washed and dried.
4). Old Gold for Wool.
Mordant with 2% chrome and dye with 60% of weld in a separate bath. 3% of chalk adds to the intensity of colour.
5). Yellow for Wool.
Boil wool with 4% of alum for 1 to 2 hours, and dye in a separate bath of 50 to 100% weld for 20 minutes to an hour at 90°C.