I was both happy and suspicious about the glycerin (glycerol), as the string made with glycerin while starting soft and pliable, appeared to keep reacting (probably the sericin in it deteriorating slowly, which is not a big news by itself, as in the past I used to degum the silk by boiling it in alcohol; glycerol is a kind of alcohol), and after a few weeks basically lost its cohesion. The sound, especially under the bow, did not hold its quality as well.

The string cooked in a solution of Potassium Chloride (KCl), on the other hand, shows increased cohesion, so it became only a logical conclusion to put the two together. The result is the best quality strings I managed to make up to this point. I use about 5% solution of KCl in distilled water, with 10% glycerin in it for all strings, except the top stressed ones (lute, violin, guitar, anything over 200 in multiplying string length on to the frequency [example: violin .327 meter * 622.24 hz for the Eb = 203.47; lute .62 meter * 392 hz for G = 243, that really hurts]. For such a strings I use 5% glycerin. The reason being a slight increase in diameter with 10% glycerin, which obviously is not desirable for the top strings.

The silk is moistened in such a solution (water, 5% KCl, 10% or 5% glycerin) , twisted and then cooked in the same solution at 90-98 Centigrade for about 45 minutes. For moistening I use cold solution. If hot solution is used, the string is more likely to come out wavy, not even. This point I mentioned elsewhere.

I varnish the string using shellac for the plucked strings, or shellac - rosin for the bowed. I think it prevents any residual reacting between sericin - glycerin, however, the string does just fine without varnish. I am not sure at the moment of all the chemistry involved here, and this technique is mostly intuitive. But it makes some very satisfying string. The solution is quite corrosive, even on stainless steel, aluminum and such, so, utensils need to be kept clean. Otherwise, it appears to be rather simple.

PS: dextrin turned out to be drying for the long, long time, but in the end, the string does become dry. (For that one person who might be trying).