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Help with European measurements


Can any of our European members explain these measurements? I’m confused by how they’re using a fraction rather than mm or cm…

“Épaisseur du lingot au départ : 95/10 laminé à 50/10 sans recuit.
Épaisseur de départ pour le motif tétralobé : 43/10
Plané pour le corps au départ : 30/10 façonné à la lime.”

It’s from a discussion on a French forum strictly for jewelry fabrication processes. I can read enough French to get the gist of the instructions, but I’m stumped at how they always describe measurements. Thanks in advance.


I think perhaps he or she is saying “the ingot was initially 95 by 10mm, reduced to 50 by 10 without annealing…”

The only French measurement I know of that uses slashes is catheter size, but the pics in that forum don’t show any tubing being used.

Good luck,



Could you pass on the link to the forum? My associate is a jeweler and fluent in French.


I found the forum at :

Google translated that section as:

Thickness of the ingot at start: 95/10 rolled at 50/10 without annealing.
Starting thickness for tétralobé reason: 43/10
Plané body from: 30/10 fashioned lime.

I think tetralobe means four lobes. Don’t know about Plane’ body.


Yes, that’s the forum. I can stumble through enough of the French to get the gist of things, especially with photos attached, but I keep seeing this style of measurement and I’m not sure what they’re doing.