| |
| | JAIC 1979, Volume 19, Number 1, Article 3 (pp. 14 to 23) |
 | | FIGURE 1 shows the lakes formed by the yellow natural dyes that are most frequently encountered: weld extract, quercitron, Persian berries, old fustic, turmeric, and kalama. |
 | | Shown are the colors of the aluminum, iron, copper, and uranium lakes of the dyes just mentioned, and also the colors of the tin lakes both before and after treatment with ammonia. |
 | | Looking at Figure 1 one can see that only the tin lakes of quercitron and turmeric are orange. |
| aic.stanford.edu /jaic/articles/jaic19-01-003_4.html (269 words) |
|