The article implies there are formulations included, mix up a new batch and compare? I know nothing about watercolor pigments, but the saturation remaining after so many years impressed me.
On the subject of mixing up a new batch, it is an easy thing to say, but often following old recipes can be tricky. What was once common and implied is no longer so. The missing context makes reproduction near impossible.
Update: I was looking at the full scan, and while I still can't read dutch, the picture in the article was cherry picked as a good example, many in the full document are very faded.
On the subject of mixing up a new batch, it is an easy thing to say, but often following old recipes can be tricky. What was once common and implied is no longer so. The missing context makes reproduction near impossible.
Update: I was looking at the full scan, and while I still can't read dutch, the picture in the article was cherry picked as a good example, many in the full document are very faded.