Posted: 24 January 2010 at 1:42pm | IP Logged

I remember using DLE as being a sulphone, but there are many variations from D to DLE to DLX and now  DLW-N. There is a section in Gustavson book on tanning about the sulphone tanning, and if I recall correctly he mentions the Supra DLE but I have to check it, I do not t have the book at hand. One interesting thing is that it does not have the OH groups of phenolic syntans, but I would have to read that part again.

I found the blue book in slide share format , it has a search engine.

Regards

Zercas

http://www.scribd.com/doc/19251902/Pocket-Book-for-the-Leath er-Technologists

Posted: 24 January 2010 at 10:27pm | IP Logged

Can I define that formaldehyde bridged phenol syntan is softer and fuller than disulphone bridged syntan?

Posted: 25 January 2010 at 3:43am | IP Logged

Maybe there is a tendency in that direction. I do not know if this is also the case with Basyntan UR.

Posted: 25 January 2010 at 9:29am | IP Logged

What ever the process may be! it varies from place to place and continent to continent.

Even if LeO comes with a process that will help you to certain extent only. And unless you are welversed with Chinease environment it is difficult.

Moreover the Chemical suppliers will not supply the same prduct to China which they supply to Europe or USA

Posted: 25 January 2010 at 2:24pm | IP Logged

You are right , no one but the "tanner" is to be blame. But how do do you define the "tanner"? If there is Alchemy, is because the tanning industry is not united, or at least not enough, it does take care of a by-product from the meat industry.

There are many hands that take care of those hides before they reach the first drum, and then the technology is in the hands of the chemical companies, that are shifting like the sand of the desert, making place for copy cat products and companies. If you add in the pot the new trends of enviromental concerns of those who buy the meat, the leather and subsequent manufactured products and those who use this turbulent situation for their own benefit...... but what I am saying? I am just describing the history of the human race.

BUT WHAT TO DO TO UNITE THE " TANNERS " AND GET AWAY FROM THE ALCHEMY??

Just pondering

Regards

Zercas

Posted: 25 January 2010 at 8:16pm | IP Logged

Mr.Kallenwe,

It is not an exuse amoung tanners. The weather condition in U.S. is entirely different from India. Will you apply the same process of tanning in U.S. that is followed in India?

Even in India, the process changes from North to South and east to East.