cedarswamp1
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60/40 solder would be 60% tin 40% lead. Your mix would be 15:1.5 or 10:1
I think?
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3006 user
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cedarswamp1 wrote: 60/40 solder would be 60% tin 40% lead. Your mix would be 15:1.5 or 10:1
I think?
Umm, not to be picky, but aren't your proportions reversed?? I thought the first figure referred to lead.. 
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Don Fischer
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Yea, it does. I don't type and think at the same time!
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cedarswamp1
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3006 user wrote: Umm, not to be picky, but aren't your proportions reversed??
Umm, no.
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Don Fischer
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Well I thought it was the other way too. So Cedarswamp, how would I make it 20:1?
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fryboy
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add a few #'s of lead ,in solder the tin is always given first but us casters are a weird lot and put the main ingredient first lolz ( check out any solder on rotometals.com ) while i do believe ur closer to 10 to 1 as opposed to 20 to 1 it should still make purty shiny boolits lolz 20 to 1 is 95% lead 5% tin a lil extra tin usually helps castibility ,the worse problem with alloys is it's never a straight and easy line lolz theoretically if u have 10 to one with 15 parts of lead if u added 15 more u would have 20 to 1 i'd prolly add about 8 and see how it cast and then compare it to some known alloy then perhaps add a wee bit more
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cedarswamp1
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First off, I apologize for the inaccuracy of my first post, 1# solder to 10# lead is closer to 17:1 not 19:1
My profession as a plumber and hobby of stained glass may account for the confusion on solder composition, I wasn't aware as a caster I was supposed to state the composition bassakward.
Alright assuming that your using a roll of 60/40 solder, I'm also goin' to assume you're workin' with 60% tin. To get a 20:1 alloy mix 1# solder to 11.5# pure.( It's actually 19.84:1)
Your solder is .6# tin and .4# lead, added to 11.5# lead you have .6# tin and 11.9# lead. 11.9 divided by .6= 19.84 close enough in my book to call it 20:1
It get's a little more complicated when you add antimony to the mix, but the basic concept would be the same.
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fryboy
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therein lay the rub ...they make a 60/40 and a 40/60 lolz sure makes 50/50 sweet when u can get it ! or at least easier to figger.... now i'm cunfuzzled..just which ratio was that solder ? lolz so .. he added either 1.5# tin & 1 # lead or 1 # tin & 1.5# lead to 14 # lead... if the latter add 4-5 # lead if the former ... a few more(4-5) for 20 to 1
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daboone
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Just a thought and it's tried and true. Back in the day I didn't have any resources but I did have lead and pewter. I'd melt some lead add a little pewter, very little (it was for me hard to come by). I'd cast a few and see how they came out, add pewter cast some more till I got good fill out. Not very scientific but it worked. I sure didn't know the composition of pewter but I knew it had tin in it.
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