I have a yarn that is 45% silk and 55% Merino. Can I "felt " this to join?
If you mean, like a spit-join...I would imagine the merino would felt enough.
Can't you just try it and see?
Again on the spit-join, takes a little more rubbing, but is do-able....
Yes, I do it, but a little different than a "spit join". I intertwine the fibers to be joined and dip them in a small bowl of hot water, then briskly rub them back and forth in my palms . . . it should join (felt) rather quickly.