Hi Adelorenzo,
There are not much information available for this product.
Based on the info available on the pouch, it is a 1:1 dilution. The can container has been replaced by a flat-pack sealed foil-bag.
The stock solution should keep is around 2 months when stored in optimal condition (glass bottle with a good stopper and as few air as possible within).
Forget about the working solution when a good black cannot be obtained in 2 minutes.
It's all I got. To reach the instruction sheet, I would have to open it...
I hope this help you.