Asking brickie to grade mortar using buckets?

[flanagaj]

I'm getting all of the sand for our brickwork delivered in one load and I want to make sure that there is no variation in mortar colour.  We are having a 5 sand, 1 cement, 1 lime mix.  Should I simply buy 7 buckets to ensure they all get filled before be discharged into the mixer?

 

What have others done / insisted is done?

 

[carlos21]

Why would there be a variation in colour?

[flanagaj]

31 minutes ago, carlos21 said:

Why would there be a variation in colour?

If you throw sand and cement in a mixer using a shovel, isn't there a risk that each batch will differ slightly, simply because no two shovel loads will contain the same volume of material?

[carlos21]

I would not have thought the colour would change that much, but iam no expert, i guess just try it out for yourself, i recon 7 buckets would be annoying,