5 research outputs found
Application of Earth Resources Technology Satellite data to urban development and regional planning: Test site - County of Los Angeles
There are no author-identified significant results in this report
Coating of Paper Sheet with Insoluble Gelatin
748-752Treatment of
paper with internal sizing agents, not only reduces the penetration of liquids,
but also affects the permeability. The mechanism by which sizing brings about
resistance to penetration by liquids is explained by the contact-angle theory.
Also the precipitation of the rosin size on the fiber forms a water-repellent
film upon drying. On the other hand, surface coating of paper sheets with
gelatin-hexamine mixture, in different concentrations, results in an
improvement in the permeability compared to the uncoated sheets. This could be
due to the penetration of the gelatin through the pores of the paper sheet and
precipitates as an insoluble film on the fiber, due to cross-linking formed
through formaldehyde, which is liberated as a result of hexamine degradation