VEXED ISSUE, INDEED.
LOKI Telson 47.5 is most likely indicated by Shore О scale (generally known as ESN scale). It approximately corresponds to 38° by Shore A.
Here are hardness values on other popular sandwich rubbers, as a convenient reference for comparison:
• T05 — 36° Shore A,
• Dignics05 — 42° Shore A.
The lack of uniformity of the hardness standards as currently used by different rubber brands is getting a vexed issue, still unsettled.
PS: We have now addressed to EQC with a proposal to enforce Shore-A scale as the only permissible hardness indication on every sandwich rubber to be sold on market.
ITTF DESERVES CRITICISM A LOT.
An another sound idea is a letter indexation on rubber package on the purpose to explicitly indicate the hardness scale in use, e. g.
HA 38° — Shore A
HO 48° — Shore O
Unfortunately, ITTF little care about maintaining fair commerce by manufacturers. We can now observe a lot of the " bastard rubbers" coming out on market, mostly made in China.
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FAIR PLAY FIRST