I don't think you need a lab. I'm pretty doubtful the region it is locked to would be smaller than the united states. And the US has several very different clom

I don't think you need a lab. I'm pretty doubtful the region it is locked to would be smaller than the united states. And the US has several very different clomates. Just order ink from a few states with different climates, say florida, maine, arizona, etc. If they all work on a printer bought in the US, clearly climate isn't the reason. Or even just point out that by that logic, in many areas you should then need to use different ink in different seasons.