Yes 1:1 is a good way to use d76, you dilute right before use, which is the way i commonly use it. But if developer is hard to come by where you are, you can get more rolls out of it by reusing stock solution. Just remember to burp your accordion bottle of all air, and keep track of the date mixed, and the number of rolls through it so far. You need to compensate with extra time the closer the developer comes to exhaustion. Kodak states 16 36exp rolls per gallon of d76 as max.