Gray card and white

[snigg]

sorry but are all gray cards and white ones all equal, looking to buy a set, any recommendations or will any do.

Cheers.

 

[HoppyUK]

sorry but are all gray cards and white ones all equal, looking to buy a set, any recommendations or will any do.

Cheers.

No. You need a neutral colour tone for white balance (can be white or grey) and you need 18% reflectance, usually, for exposure (doesn't have to be dead neutral). You can also get both in one.

Try Lastolite.