News from akromatic.
"Based on the feedback and requirements of some VFX Facilities, we decided to release a new flavour of our calibrated paint.
Some Look-Development Artists prefer to use grey balls with higher specular components and other Artists are more comfortable using less shiny spheres.
It is matter of personal preference, so let us know which one is your flavour.
Original spheres: Gloss average around 30%
New spheres: Gloss average around 18%
Both of them are calibrated as Neutral Greys and hand painted."
All the information here.