[26] Analysis performed by A. Ness Proaño Gaibor showed the presence of ellegic acid, a degradation product of tannins from a plant source, possibly gallnuts or sumac; see Ortega Saez, Black Dyed Wool in North Western Europe, 316.
[26] Analysis performed by A. Ness Proaño Gaibor showed the presence of ellegic acid, a degradation product of tannins from a plant source, possibly gallnuts or sumac; see Ortega Saez, Black Dyed Wool in North Western Europe, 316.