Shade variation
The V1 to V4 scale describing how much tone and pattern differs between tiles in one series.
V1 means uniform appearance, V2 slight variation, V3 moderate and V4 substantial, where individual tiles can look clearly different from one another. The variation is deliberate in stone-effect series and is part of the design.
For buyers the practical rule is documentation: a shade code sealed at first order lets every later container match, which matters more than the V rating itself for phased projects.
Icona Casa controls shade-to-shade variation within tolerance and confirms the reference in the quote. Top-ups are matched against the sealed batch, not re-described.
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