The measurement method required by the DIN 51130
standard defines the following slipperiness classes
and indicates their respective environments of use

R12 A+B+C
areas for the production of fatty foods such as
dairy products and derivatives, oils and deli meats,
large kitchens in foodservice businesses, industrial departments
where slippery substances are used and parking lots.

For wet areas where people will be walking barefoot,
the floor must meet even stricter requirements.
These can be measured based on the DIN 51097 standard
and are classed in groups A, B, C with increasing values:

A – locker rooms, areas where people go barefoot, etc.
B – showers, swimming pool sides, etc.
C – sloping swimming pool sides, submerged ladders, etc.

Tonal variations
By "tonal variations", we mean a series of chromatic gradations
that are visible and not blendable. It indicates the difference of tone
between single tiles that are not homogeneous with each other.
In particular, we have defined classes for grouping
the various porcelain stoneware tile collections.

V3/HIGH
Moderate variations