I bought the half-size cakes - They are plenty big and certainly more convenient size for carrying in your cas3e or pocket.
I have not tried their "signature" cello rosin yet - maybe later today!
LATER: Yeah! Their cello rosin is as good as the violin and viola Cecilia Signature rosins. As good as any I have ever used. What I don't know yet is how these rosins will play through 90-minute mark in rehearsals or performances.
SHAR used this endorsement:
"I have been trying out the new Signature Formula from your CECILIA Rosin collection and I really love it. It is strong but not too grainy creating a full and rich sound. It also lasts longer so I don’t have to rosin my bow as often. I have tried at least 30 different brands of rosins over the years, but CECILIA Signature is my favorite. Bravo!" - Glenn Dictrow, Former Concertmaster - The New York Philharmonic
The full rich tone, the ability to also get "expressive" variations with the bow were noticeable to me immediately.
The biggest surprise occurred with the cello rosin; using it with my Paul Martin Siefried cello bow allowed it to sound decent in the third octave of the C string of my preferred cello. This bow has never before been able to do that.
I still have more Cecilia "experimenting" to do.
And, by the way, the 1/2 cake is not that small - it is the same size as my old Tartini and Andrea cakes.
Incidentally, I dropped my solo yesterday and smashed it. I've ordered a silicone cake tray in an attempt to fix it...
I think you want to heat it to the lowest possible temperature for the shortest possible time to minimize vaporization of (possibly) important constituents.
edit:
Tealight case and double-sided sticky tape to the rescue... lol
https://imgshare.io/image/rosin.NvEhwe
As a retired adhesive chemist I worked with rosin and similar materials for 47 years and I would not melt rosin in my home. But if you do, make sure you have adequate ventilation. Rosin vapors can cause a strong allergic reaction in some people.
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