This preview shows page 1. Sign up to view the full content.
Unformatted text preview: a. The aleppa gall from a wasp oviposition on an oak tree has been used since the time of the Greeks as a non-fading ink b. It was also used for hair dye and a medicine c. Gall ink was used to write kosher torah scrolls d. It is also used by the US Treasury in the formula for money ink 7. Lac Scale (shellac) a. Lac is the basic ingredient of an amazing list of articles, stiffening agents in toes/shoes of shoes and felt hats, polishes, fruit coating apples, lithographic innk, glaxes in confections (candiesmedicines) records, playing card, mascara, b. Lac scale b.i. Native to India and Berma b.ii. Found on fig-type trees b.iii. Shellac used since 1200 BC 8. Silk a. From silkworm larvae or spiders typically b. Dragline spider silk is actually stronger than Kevlar synthetic fiber and Kevlar is several times stronger than steel c. Today techniques commonly employed to recreate silk’s properties...
View Full Document
This note was uploaded on 01/16/2012 for the course ENY 1001 taught by Professor Barfield during the Fall '11 term at University of Florida.
- Fall '11