Rum: light and dark from the same batch - theory

[edge]

A newbie question, when you refer to dunder is that interchangeable with backset or are you referring to the foam of fermentation?

Along with that question do you/could you add residue from the fermentation tank to that of the still and add no new yeast.
Just trying to figure out what works and what doesn't from the experts.

Thanks, edge.

[blind drunk]

foam of fermentation

That's the original meaning of the term in rum making. Here, dunder and backset are the same thing, the former for rum and the later for grain/sugarhead, usually.

[LWTCS]

New wash will be mostly molasses, at about 2.5:1 ratio, molasses to sugar. You can tweak this as you prefer, up or down, but that's my starting point.

..

Yes, thanks for differentiating Barney....and the common thread here is that it is the unfermentables or the accumulation of unfermentables within the wash that give the product its heavy or light character.

I use 100% panela (condensed cane juice)for my ferments. 8 or 10 pounds per 25 liter volume or so.
Molasses in my area is pretty expensive....
The panela has had no sugar (sucrose) rendered out of it like molasses. So my initial batch will be "lighter"...
As such, I add back 25% dunder to total volume on subsequent batches within my cycle in order to install some heavier notes...as well as charge my thumper with dunder to help carry over some heavier qualities.

I would say that in general my base rum (recipe) is going to be a bit lighter than the more traditional approach one can employ by using molasses. And as such, my heavier notes come later rather than sooner...

Hope that clarifies this discussion a bit better rather than fragmenting it.
Cheers Barney

Larry

[edge]

LWTCS, what SG would you normally get using your panela wash, and how much rum do you yield from 25l?

Thanks, edge.

[LWTCS]

LWTCS, what SG would you normally get using your panela wash, and how much rum do you yield from 25l?

Thanks, edge.

Well I have never measured. And because this is evaporated cane juice rather than ,,,,say a "C" strike "raw" sugar product...there is no real way to figure the gravity/brix from batch to batch unless one takes a measurement,,,,as the amount of sucrose and fructose can vary from crop to crop,,,,season to season,,,,,much like any other fruit or crop or what have you.....But Dnderhead helped me reckon that 10lbs of panela may be the equivalent of 8 pounds of refined (plus or minus)......I typically don't really care what I get as I will get what I get and I don't get upset
And depending on the way I run my still,,,,,my yield can also vary. But I collect about 2 to 2.5 liters...and with that boiler charge I add back last run feins..
Did I say that clearly???as Friday is upon me

[Poitín Paddy]

Love this discussion and bookmarking for future reference!

[edge]

LWTCS, thanks

I can get it for about 1.50 per pound from Shop-Rite without any searching!
It seems that some feed molasses, some panela, and some cane sugar to conserve costs should make for a good wash...thanks.

edge.