Is any one familiar with a math formula that will give an accurate and repeatable percentage for alloy content? I'm only looking for the tin percentage in batch sizes and solder types that will vary. Assuming that WW's have a .5% tin content, and my target is 1%. Today I may be looking at 10lbs of WW's and have 60/40 solder, wile tomorrow it may be 50lbs of WW's and 90/10 solder.
Thanks in advance