benjamin moore grand entrance gloss

Hi
I have bought some of the BM grand entrance gloss and have a query
it says on the tech info

• High Gloss Sheen (>85 @ 60°)
• what does the @60 mean ?

i have to say i am not that impressed with the gloss level it is more like a rather shiny satinwood than a gloss
i have previously used little green gloss which also says on the technical data

• Gloss level - 85% (very high) (but does not have the @60 after it
• and the little green is far shinier than the BM...

benjamin moore grand entrance gloss