I am no expert on tanning but have followed the procedures of my instructor who has been doing this for 30 some years with great success. It interests me but I do not currently have the time to study the different processes and still maintain employment and a taxidermy business. She swears by Oxalic acid pickle and Lutan-F tan and for that reason I use it. So amongst all of the controversy that has been thrown on here about the Lutan directions being incorrect I decided to text her about this to get some clarification and I received an immediate phone call from her yesterday. She had attended several tanning seminars led by Bruce Rittel over the years and even notified the owner of Knoblochs about this topic for clarification. I know there will be some that disagree and have their own ideas and tanning preferences but through her research, training, and experience this is in a nutshell what I took away form our brief conversation: Raw/green hides must be salted prior to pickle, pickled hides must be neutralized prior to tanning, and you need to have a pH of 3.8 when tanning with Lutan-F. If hides are not properly salted the globular proteins/bacteria will not all be forced out of the hide. Salt for at least 24 hours (I dry salt). After salting you need to rehydrate the skin back to a raw state before entering the pickle. Using oxalic acid mix the pickle accordingly to a pH of about 1-1.5 prior to placing your hide in the pickle. Pickle and occassionally agitate for at least 24 hours before shaving, and after you shave return to the pickle for another 48 hours, agitating occassionally as well. At that time neutralize your hides with baking soda (sodium bicarbonate) to raise the pH and remove the acidity from the pickle. This is done by adding 1/2 ounce at a time and agitating the hide in the pickle for five minutes. Repeat this process untill you reach a pH of 4-4.5. By adding 1/2 ounce at a time you are slowly opening the skin pores and preparing the hide for tanning. If you apply too much baking soda too quickly you are risking slippage and twisting of the hair in the follicle (She had a name for it but I am at a loss right now). So now that your at a pH of 4-4.5 let your hide remain in this neutralized solution for 20 minutes agitating the hide to ensure all of the hide is being neutralized of the acid. At that time quick rinse your hide in water to remove the residual baking soda and damp dry your hide by spinning it or hang dry for about 30 minutes. After you have your hide drip dried, weigh it and mix your Lutan-F solution according to the weight of the damp dried hide. Once your tan is mixed is when you need to add oxalic acid back to the tanning solution to bring your pH back down to 3.8. She said it doesn't take much, maybe 1/4 to 1/2 ounce. Once your pH is at 3.8 add your hide to the solution for 18 hours (deer). Neutralize again following the previous procedures, and then remove and rinse the tan out of it and proceed to damp drying, oiling, and sweating. Sweat overnight in a refrigerator, and the next morning blot the water off of the skin, do final fleshing (skife) and either freeze or mount.