You are right to question the advertising claims and bombastic naming, but that excerpt is nonsense. Nylon string + dye is what makes for coloured (usually black) strings - not adding "carbon". Separately, the so called "carbon" strings are actually made from a fluoropolymer - "a fluorocarbon-based polymer with multiple strong carbon–fluorine bonds". The one widely used is vinylidene fluoride. I guess the marketing people shortened fluorocarbon to carbon. Of course, this is not how chemistry works, but is apparently how marketing works..pogmoor wrote: ↑Sat Jan 06, 2018 11:55 am[quoting SBM or Galli]
I think I might start making a small collection of the nonsense written about guitar strings by advertisers. Perhaps someone would like to explain to me how titanium could be polymerised with nylon?
Even better, I found on another website (a reputable German seller of musical supplies):The standard material used for plain classical guitar strings (E, B and usually G) is solid, round-section nylon.This is usually transparent, but some manufacturers offer ‘carbon’ plain strings - these are made from nylon with a small percentage of carbon, which results in a solid black colour and a more percussive, overtone-rich sound.
As far as "titanium" strings - you will be surprised to hear that there is no actual titanium in them - neither in the trebles nor in the wound basses. The trebles are apparently some mixture of fluorocarbon and nylon and possibly some dye - it is the colouring that "titanium" is supposedly referring to.
BTW nylon is actually polyamide (PA). There are 2-3 types of PA used for nylon strings. So mixing zero or more of these with zero or more of the fluorocarbons gives manufacturers enough variety of resulting properties to make various claims about sound qualities of classical strings, I guess.
This however is a global property of nylon in nylon strings - they go sharp as they warm up because the structure of the bonds is such that the string expands radially when it warms up - so it is pulling itself getting slightly thicker - which makes for increased tension - which makes for a sharpening of the pitch.Kurt Penner wrote: ↑Sat Jan 06, 2018 3:53 pmameriken, I was referring to the latter, that is, the open string would sharpen as it would warm up with playing; then I would need to retune. The intonation was unaffected as I recall. I bought about 6 sets of EJ45TT (I think) and after about 3-4 sets I realized this tendency would drive me nuts. Pity, I liked the sound.