It sounds to me like the diastiks that diabetics use to see if sugar is spilling over into their urine, in which if it isn't changing color is a good thing.

For you to know you are in ketosis you don't need the sticks -- you will notice a taste in your mouth, and if you are eating what atkins allows only, you will be in ketosis in a few days to maybe a week.

The ketostiks change color as to how much ketones you have in your urine, but if you are drinking lots of water your urine will be deluted and will show a lighter shade of pink. Any shade shows you are in ketosis, sometimes the darker color will show you might be dehydrated.

Hope this helps.

Debi