Talk:Tannic acid

message: "Tannic acid is a basic ingredient in the chemical staining of wood."
Is this a poor choice of words?  Or is it really basic in wood?
njh 7 July 2005 09:17 (UTC)
"It is said that soaking feet in tannic acid (or strong tea) can help prevent blisters. But the use of tea for toughening skin appears to be apocryphal, inasmuch as tea is said to be incapable of tanning leather."
I'd like to see more information on this. The reference "tea does not tan leather" doesn't seem to be a very reliable source as it does not state where the information listed originated.
Isaac.tanner.madsen 07:08, 6 March 2007 (UTC)
thread_title: Untitled

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thread_title: [[WP:FOOD|WikiProject Food and drink]] Tagging

message: This article contains medical material published in 1901 - date of the publication of Dental Medicine . A Manual Of Dental Materia Medica And Therapeutics | by Ferdinand J. S. Gorgas (actually copy-pasted from a publicly available source). Given the medical advances in the last 100 years or so, this advice is obsolete and should be replaced by more up to date information.
207.112.87.166 (talk) 20:28, 8 January 2009 (UTC)
thread_title:  WARNING!!! 

message: Is there a better way to format this so the sidebar is, well, really a sidebar?  Sidebar is unreadable as is (in Firefox, at least) at a reasonable window width.  —Preceding unsigned comment added by 76.121.5.134 (talk) 18:59, 13 March 2010 (UTC)
thread_title:  SMILES length problem 

message: " Its weak acidity (pKa around 6) is due to the numerous phenol groups in the structure. " - from the first paragraph
"Acidity (pKa)	ca. 10" - from the sidebar
Which is it?!
66.189.177.23 (talk) 20:51, 25 April 2010 (UTC)
thread_title:  pKa? 10 or 6? 

message: Phenolic content in tea states "tea does not contain tannic acid". 
Based on that, I clarified the statement about this in the intro here (my addition highlight):
While 'tannic acid' is a specific type of 'tannin' (plant polyphenol), the two terms are sometimes (incorrectly) used interchangeably. The long standing misuse of the terms, and its inclusion in scholarly articles have compounded the confusion. This is particularly widespread in relation to green tea and black tea, both of which contain tannin but not tannic acid.Steven Wheeler: Science Magazine. 
Remaining problems: 
* I'm not sure what the reference above to green tea vs black tea is about - needs to be clarified. 
* The reference I above, which I found on Phenolic content in tea, presumably is relevant to black tea, more commonly used in Western countries in 1979. I'm further assuming it applies to all teas, but a clearer reference on this point would be good.
* This article talks about tea used for burns, and seems to imply that tea contains tannic acid - this needs to be clarified, or possibly moved. --Chriswaterguy talk 09:30, 21 March 2012 (UTC)
thread_title:  No tannic acid in tea 

message: Substituted at 07:37, 30 April 2016 (UTC)
thread_title: Assessment comment

message: One paragraph says that a Mr Atcheson, inventor of carborundum, further discovered that gallotannic acid improves the plasticity of clay.  Thus the Hebrew laborers were able to make bricks without straw because they were able to use the stubble of the plant, which contained gallotannic acid.  
But his Biblical revelation is rather incomplete.  Like, what plant are we talking about here? Egyptian Gallotannic Crabgrass, perhaps? And what stubble?  I suppose there'd be stubble from harvested wheat, which isn't mentioned here.  Is that where the gallotannic acid would come from?
My sense is that if gallotannic acid was of any great use in brick-making we'd probably still be using it.  Kinsler33 (talk) 01:08, 15 September 2019 (UTC)
thread_title:  Bricks without straw