Hi again, Well, finally i bought KBr that can be used in Caffenol one of the formulas, but i am not very aware abut that Caffenol long discussions here or on the Caffenol blog itself, so i will put my direct questions here and hope getting the answer direct to my questions rather than reading long many pages and give up, English s not my first language and the search will take long time for me which may end up for me to give up. 1. What type of coffee i should use? I am not sure if that Nescafe in the store will be good enough, we have 2 or 3 different Nescafe coffee bottles and i am confused which one to buy. Also we have a mill or roastry where they grind pure coffee [brown or black coffee, gray one,...etc], is that better go than buying those coffee make bottles? i try to get the pure or RAW material as much as i can so i don't have issues what other materials are included with RAW material chemicals. 2. Where i can get wide list for measuring the ingredients to make Caffenol to many different volumes? I will use it for 500ml developing and also LF which i am planning to go with 1L volume for now, and i am not very keep about measurements enough, i don't want closer measurement such as 485ml to be as 500ml or 970ml as 1L, i want to go with +/-2ml if i will mix for Caffenol on those 2 volumes i mentioned. 3. What is the KBr[Potassium Bromide] do to the Caffenol developer? I mean what is the characteristic of KBr that added to Caffenol? Will be there a big difference between going with caffenol with KBr and without? 4. Is that mixing Caffenol a one shot or can be used again if i develop immediately after first developing? I am not planning to mix Caffenol and store it afterwards, i just mix to the given volume and discard, i have enough quantity of the RAW material if i will get the coffee to mix many times. 5. Is Caffenol good enough recommended for agitation tanks or it is better for say drum and rotary processors? 6. Funny question, what is the chemical formula or name for Coffee? Sorry if those questions are answered all elsewhere, but as i said it will take me maybe weeks and months to find all the answers of above from here and there, so i summed all the questions i need answers to, it will help me to understand more what i am reading in Caffenol blogs/groups.