HI All,
I said I would so here you have it:
GLD is a GMNA visual specification. It basically replaces gloss specification's being simply numerical values 2.0GU etc.... and makes the verificaiton and approval reliant upon a visual comparison with the "GLD" section of the master colour plaque.
It still uses numerical comparsions but not in isolation anymore. I think they found that numerical gloss values varied so much from material to material. The example they gave is that vinyl may look very glossy but would still yield low gloss numerical values.
So they compare PPAP samples with a required numerical target with a reference standard of that numerical target + the GLD portion of the plaque.
Hope this is clear, thanks again guys for your input and hope I have just enlightened you sufficiently!
