tag:blogger.com,1999:blog-8752950690535469488.post4506595598346034207..comments2024-03-25T01:43:33.094-05:00Comments on Save Vs. Dragon: Scrutinizing the Scroll Part III: Investigating InkNew Big Dragonhttp://www.blogger.com/profile/02412016128904985180noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-8752950690535469488.post-60912157960155117942012-06-26T23:40:37.618-05:002012-06-26T23:40:37.618-05:00Lamp-black does qualify as a pigment (e.g., Japane...Lamp-black does qualify as a pigment (e.g., Japanese/Chinese ink sticks, "India" ink). As for iron-gall ink, as I understand it, the conversion of the source material begins (acid extracts coloration from the oak galls) in a liquid form. The liquid is reduced by "drying" and the color changes (from clear to "black"). When it's mixed with the additional agents it's still in a liquid form so technically I believe iron-gall would be considered a dye. <br /><br />As for things like "optical whiteners" that "convert" energy, it depends on what the substance is and how it's used. For example: the optical brightener in laundry detergent is a dye; something like a pearlescent coating on a hot rod is a pigment; the pyranine used in highlighters is a dye; the fluorescence of blacklight paint comes from a UV-sensitive pigment, and so on...New Big Dragonhttps://www.blogger.com/profile/02412016128904985180noreply@blogger.comtag:blogger.com,1999:blog-8752950690535469488.post-9810956321154567002012-06-26T21:25:37.748-05:002012-06-26T21:25:37.748-05:00so where do iron-gall and lamp-black inks fall: p...so where do iron-gall and lamp-black inks fall: pigment-based?<br />(india ink, sumi ink, etc)<br /><br />Also, (semi-science related)<br />"optical whiteners" (like in your laundry detergent) absorb incident light from 'invisible' wavelengths (i.e., ultra-violet), and reemit that energy in the visible light spectrum.welbohttps://www.blogger.com/profile/00234798241485093836noreply@blogger.com