Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 1 of 1
Full-Text Articles in Physical Sciences and Mathematics
Condensation Of Terephthalaldehyde And Hydroxyacetophenones, Ernest John Bonelli
Condensation Of Terephthalaldehyde And Hydroxyacetophenones, Ernest John Bonelli
University of the Pacific Theses and Dissertations
Organic pigments were the source of coloring matters used by man until comparatively recent times. It is to be presumed that the first steps in the use of these pigments no dyes resulted from the accidental staining of the skin or fabric by a vegetable material. Prehistoric man, in order to decorate his implements or his person, or even to make records of his mode of life, used the materials with which he came in daily contact. Coloring materials included earth and vegetable substances found in flowers, seeds, berries, nuts, bark, wood, and roots, and less readily available coloring materials …