Use alum mordant (see page 68). Then dissolve the quercitron extract 

 in 4 to 4}^ gallons of soft water. Before immersing mordanted wool in the 

 dyebath, thoroughly rinse it and squeeze out excess moisture. Iinmerse the 

 wool; heat the bath to boiling; boil for 30 minutes. Then without rinsing, 

 transfer the material into a boiling water solution of potassium dichromate 

 and acetic acid or vinegar. Stir carefully while boiling 10 minutes, rinse 

 and dry. 



Gold Cotton: alum-tannin-alum mordant 



Colorfastness : good 



Use Dye Method 2 (see page 72) for quercitron bark 



Use the following dye method for quercitron extract: 

 1 pound cotton 

 y^ ounce quercitron extract 

 li ounce potassium dichromate 

 Ys ounce acetic acid, or 6 to 7 tablespoons vinegar 



Use alum-tannin-alum mordant (see pages 67 to 69). Then dissolve 

 the quercitron extract in 4 to 4}^ gallons of soft water. Before immersing 

 the mordanted material in the dyebath, rinse it and squeeze out excess 

 moisture. Immerse the cotton; heat the dyebath to boiling, boil for 30 

 minutes. Without rinsing it, transfer the material into a boiling water 

 solution of potassium dichromate and acetic acid. Stir carefully while 

 boiling for 10 minutes, rinse and dry. 



Oak Bark, Chestnut {Qiiercus prinus) 



The chestnut oak is native to the eastern part of the United States and 

 grows in dry woods from Maine to Alabama. 



Dark Yellow-Tan Wool : chroine mordant 



Colorfastness: fair to light, good to washing 



Dye Method 1 (see page 72) 



Light Brown Wool: alum mordant 



Colorfastness: good 



Dye Method 2 or 3 (see page 72) 



Oak Bark, Northern Red (Qjiercus rubra var. borealis or Q^. borealis 



var. maxima) 



Northern red-oak trees are found throughout the eastern half of the 

 United States. 



Tan Wool: chrome inordant 



Colorfastness: good 

 Dye Method 3 (see page 72) 



76 



