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Subject Topic: Pretanning with Tobacco Post ReplyPost New Topic
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rramachandran_1
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Posted: 01 November 2011 at 9:34am | IP Logged Quote rramachandran_1

Some time back I suggested the use of tobacco  in Tanning as it contains HCHO.

http://quitsmoking.about.com/od/chemicalsinsmoke/p/Formaldeh yde1.htm

Wish to know if any one tried that.


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DavidR
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Posted: 17 November 2011 at 1:44pm | IP Logged Quote DavidR

Eskimos and NorthAmerican Natives have tanned with smoke.
The classic smoked fish are formaldehyde tanned and the
stomach acids reverse the tannage and digestion can be
acomplished! There is nothing new under the sun!

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rramachandran_1
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Posted: 18 November 2011 at 2:31am | IP Logged Quote rramachandran_1

Thank you Mr.David.
Can you enlighten us if the same smoke can be applied on pelt? At least for special skins like Rabbit, Hair on etc?


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DavidR
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Posted: 18 November 2011 at 9:13am | IP Logged Quote DavidR

I do not see how that would be practical! I have heard
at
tanner's informal conversations generally aided by some
alcoholic bebverage, that perhaps placing pelts
in a pressure capsule and fill it with formaldehyde gas
to initiate the (pre)tannage might be feasible.
What is wrong with applying formaline in a slightly
salted (just about 3-4 Baumes to avoid too much acid
swelling, in a drum) pickle state at very low float, and
then after complete penetration of formaldehyde, add
first some more salt (to 15 Baumes for dehydration) and
then some alkali-containing water to create a large float
that would lower the ionic strength (5 Baumes) due
salinity and thus help to fix aldehyde (end pH~8) ?

Edited by DavidR on 18 November 2011 at 9:35am


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