@mc: Casings and toppings are generally regarded as trade secrets, and only divulged by manufacturers when they are required by law to do so. In the US, there are no labeling or disclosure requirements for pipe tobacco, so we really don't know for certain what is in any given blend, aside from whatever descriptive may be in their sales and marketing info.
Denmark, on the other hand, does have disclosure regulations, but only for domestically produced tobacco (as far as I can tell). Domestic production, however, encompasses most of the STG brands.
This Link https://sundhedsstyrelsen.dk/~/media/B70AE3FD5E154A7091742CB491FB8008.ashx will take you to a chart that you might find interesting.
Here is the same chart, but for Mac Baren
And here are the old Imperial brands like Capstan and Davidoff go here and scroll down to page 45
Denmark, on the other hand, does have disclosure regulations, but only for domestically produced tobacco (as far as I can tell). Domestic production, however, encompasses most of the STG brands.
This Link https://sundhedsstyrelsen.dk/~/media/B70AE3FD5E154A7091742CB491FB8008.ashx will take you to a chart that you might find interesting.
Here is the same chart, but for Mac Baren
And here are the old Imperial brands like Capstan and Davidoff go here and scroll down to page 45