Line strength testing...
About ten years ago all the west coast beach fishermen were wondering about all the new Mono & flourocarbon lines on the market... I had purchased a new #30 pd scale with a plastic stopper to show the top weight when lifted..I started testing everyones lines ( about 3' each sample)..Using a vise to hold the scale, I attach one end to a duolock snap with a 100% Palomar knot...On the other end is wrappped about three rolls on a wood dowell...I would slowly pull till the line broke...I did this test at least six times to get a good average... You must remember to moisten ( saliva ) on the knot ,as it makes a tremendious difference in poundage tests...There are no sharp edges with this process while testing...You can test many knots & see the differences each one produces... Reg mono is stronger than Flourocarbon , but Flouro is more abrasive proof than mono....I also found the Triple surgeons knot to be 100% , rather than the blood knot which is only about 70%....This is all i use for making fly leaders now... I tend to use P- line which tested the strongest....BUT after using a Micrometer to test diameters of line , found that alot of strong lines were actually thicker than others, which justified why they tested higher than the smaller lines.. I still use P-line as it works for me...Remember Saliva first ...It works better than dry knots....Think i had way too much time in the off season...But It improved my lines , leaders & makes me more confident in my equiptment...Try it....Jim