Curiosity got the better of me - just received my order early this week of the "Sartory" violin rosin (Peccatte). Here's a few observations.

Sartory seems to be a very good, lighter rosin.  It's actually a medium color - lasted me a few days of my 2-4hrs/day "abuse", not too much dust but this rosin didn't help my strings sound as well as the "Andrea Solo" does - for now.  This would probably be the lightest rosin I would ever think to use.

Before I continue (and all this matters), my "Mortimer" is a 5-string Carbon Composite A/E violin by Glasser. My bow is FM Carbon Fiber Weave - and my strings are Zyex C , Larsen Virtuoso G & D, Obligato Chrome A and Pirastro Gold Label E.

I've been using "Andrea Solo" for violin for the last 7 months & I love it!  This rosin seems to help me coax the best sound out of my "Mortimer", but it's taken me a while to be able to tell when I need to add more to my bow because it lasts several days of my playing.  If I start feeling the need to press on my bow, it's time to add rosin.  Andrea Solo is a darker, softer rosin but no where near as dark or soft as "Kaplan's Art Craft, dark #7".

"Kaplan's Art Craft, dark #7" - way too soft & caused a lot of extraneous string noise.  I can't for the life of me figure why I tried "dark #7" other than I made a mistake when I ordered it (I'm sure I saw a recommendation, somewhere - maybe for EV)!

I forgot I also have some "Premium Holstein" that I bought before the "Andrea Solo".  It's a medium color like Sartory, but softer/stickier.  The "Premium Holstein" started cracking at the base where it's attached to the wood lid - just from use?  I never dropped it!  Based on infrequent need and sound, between the two mediums, I'd keep the "Sartory".

I tried several light rosins - they were all too dusty, didn't last and didn't help at all with sound!  I don't have any of them around anymore and I don't even remember the brand names (sorry).  Oops, found I do still have some "D'Addario" natural light - it's going in the trash, now.

That's all for now, folks!

- Emily