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 The Black Diamond Guarantee!  Core-Bond ™️  strings have wonderful clarity and tone. Sustain and volume is fantastic and the set will hold their tune in perfect pitch. Settling in fast and lasting tone for a very long time, we are confident you will enjoy Black Diamond Strings with Core-Bond ™️  Technology

WE HAVE CHANGED THE GAME FROM THE INSIDE OUT AND WE *GUARANTEE AGAINST PREMATURE LOSS OF YOU'RE TONE!

WHAT CAUSES A STRING TO LOSE IT'S TONE

Tone loss is when the wrap and core coupling is compromised either through mechanical degradation from the vibration of the string or galvanic corrosion due to the dissimilar metals used in the manufacturing. Core-Bond ™️ addresses this issue by effectively "locking" the relationship of the core and wrap wire as "one", which gives protection against dissimilar metals that cause galvanic corrosion.

The buildup of dirt, skin cells and acidic content in your hands get down between the windings and effectively dampens string tone as well as starts the corrosion process of the core wire. The string isn't mechanically dead, however, the tone is compromised until the strings are cleaned which can be a difficult process to complete. Some string companies coat the wrap wire and sometimes coat the whole string to address this issue. However, a string with an outside coating may also dampen the true tone of the string as well as eventually frey off from normal playing. Coated strings will not prevent galvanic corrosion. 

Leading brand of coated strings. Once the outer coating is breached corrosion accelerates 

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With a coated wrap wire or even a completely cover coated string, your guitar pick as well as your frets act like a file and eat into the coating which then exposes the wrap and core wire to corrosive elements. In addition, covers and coatings may dampen tone as well as string output.  In most cases, many recording artists may use uncoated strings in recording sessions to maximize the full tone potential of the strings and the guitar but opt for a coated string on stage due to touring and climate changes. A guitar tech for a touring artist will purchase dozens of sets for the tour. It is not uncommon for a tech to change strings at every location stop and the main reason is to assure the artist that he/she has a fresh set on the guitar. However, with Core-Bond ™️  Technology, which is uncoated on the outside, they will not frey, will retain its tone longer, eliminates galvanic corrosion and the integrity of the string is increased for a very long time. In some cases, our beta testers claimed that the wound strings lasted up to 1 year with no tone loss. Now, it's not common for a guitarist to have a string on for a year, however, in our testing this was the case.

WHAT IS GALVANIC CORROSION

Galvanic corrosion (also called bimetallic corrosion), is an electrochemical process in which one metal corrodes preferentially when it is in contact with another in the presence of an electrolyte. Galvanic corrosion in a wound string starts immediately after it is manufactured and even more so as it's transported and stored. The difference in the core and the wrap metal alloy causes galvanic corrosion to occur. The same is said for the acidic content in a player's hands which seeps between the winding onto the core wire causing the core to corrode onto the wrap wire from the inside out. With Core-Bond ™️  this doesn't happen. Some discoloration on the outside of strings is normal over time, however, Core-Bond ™️  Technology dramatically reduces the chance of loss of tone due to the breakdown of the core to wrap coupling. A string that may start to look bad due to tarnishing, does not necessarily mean the string is bad. It is the core to wrap coupling breakdown that is the cause for tone loss and ultimately a dead string. A brand new string can also be a dead string if the manufacturer core to wrap ratio and coupling was not made the right way in the beginning. With Core-Bond ™️ is virtually impossible to manufacture a new dead string due to our bonding activation process. So you can be assured each and every set of strings has the integrity you need and want.

IF I CLEAN MY STRINGS AFTER EACH PLAY, DOES THIS SOLVE THE CORROSION PROBLEM

No, it does not. Moisture in the air, as well as elevated temperature changes and the acidic content in your hands, attack the strings integrity. When a guitar is transported in a guitar case, there would be no way to eliminate these threats unless the guitar is in a humidity controlled environment every day.

Core-Bond ™️ PROVIDES ADDITIONAL TONE AND LIFESPAN

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Core-Bond ™️ Technology increases strength, eliminates the chance of core to wrap slippage and makes for a revolutionary new string design !

As a wound string is tuned to key, the core wire stretches and thins slightly while the wrap wire does not. For this reason, most string manufacturers spin the wrap around the core under core tensions similar to pitch. As the string vibrates during use, the core wire can also thin slightly, allowing movement of the outside wrap wire to slip, which over time, will cause the coupling to become compromised and therefore the string effectively starts going dead. Corrosion over time has the same effect. Core-Bond ™️ process ensures the integrity of the coupling over a much longer period of time, if not for an unprecedented period of time by "bonding" the relationship of the wrap wire to the core wire.

Stabilization of tuning, the strength of the string and the loosening at the twist ending by the ball are all obstacles that need to be addressed and eliminated when manufacturing a wound string.  It is virtually impossible for the ball at the end of a Core-Bond ™️wound string to unravel.  The twist lock at the ball on the wound strings become "BONDED" together once the final activation process is completed. 

ASSEMBLY BONDING AND THE BLACK DIAMOND #BD6900 WINDING MACHINE

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BD6900 CUSTOM MACHINES

We start out with U.S.A. high-grade metal alloy. The assembly of string begins with the application of core wire placement and pulled to a specific tension. The outer winding material is then applied by Black Diamonds most advanced string winders in the industry. Named the BD6900, these winders are one-off specialized made machines built by Black Diamond.  The DB6900 assists Black Diamond production operators to accurately produce, with precision, a Core-Bond ™️ string every 20 seconds resulting in an unparalleled and consistent product.  The BD6900 winders computer-controlled technology allows production operators to input and monitor pull tension, speed, braking, and pitch angle to name a few of the variables available to the operator. The objective is to achieve our proprietary calculations for core-to-wrap coupling. This completes the first phase of a Core-Bond ™️  strings.  Phase-two is the most important process. The Core-Bond ™️ activation phase is to submerge the string in our proprietary treatment bath that activates the inner bonding and "bonds" the core to the wrap wire. The result is longer life,  lasting tone, more strength, projection, and output. These are the number one attributes most guitar players are looking for in a great string.

WE HAVE CHANGED THE GAME FROM THE INSIDE OUT

COATED VS. NON COATED Core-Bond ™️ TESTING IN OCEAN WATER

We took a very extreme approach to our testing. By submerged Core-Bond ™️ treated strings in a 5% Saline bath to replicate ocean water, the image below show results 96 hours. Keeping in mind,  Core-Bond ™️ strings DO NOT have an outer coating to protect the strings.  The result is amazing.  Now, we realize a player is not going to put their string in ocean water, but this does validate the protection caricaturists of a Core-Bond ™️

The strings were clipped at each end to show the accelerated of corrosion at the ends of the exposed steel plated core wire.  Notice seepage of corroded core coming through the center of the coated strings on the right, compared to the non outer coated Core-Bond ™️ treated string left .

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PLATED WIRE vs Core-Bond ™️

Steel core wire can rust if it is not plated. Almost every string manufacturer in the industry uses a plated core wire. However, a plated core only helps in the very short term. Anytime dissimilar metals and electrolytes are present without protection, galvanic action will occur. A core that is plated, does not give protection against wrap to core separation due to corrosion which starts from the inside out and subjects the string to premature tone loss and in some cases a dead string. Core-Bond ™️  prevents this from happening.

Magnification image below shows Black Diamond strings high carbon steel core and the valleys Core-Bond ™️ create. The valleys is where the wrap wire once was. The core wire is protected by Core-Bond ™️ as well as the spaces between the windings. The valley tips shows how Core-Bond ™️ by Black Diamond Strings flows upwards in the final activation process around the wrap wire.  

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TESTIMONIALS DURING BETA TESTING

A 2-year test in the hands of actual players confirmed the advantages of a Core-Bond ™️  treated string. Here are a few...

"I use a Fender Telecaster and had the Core-Bond ™️  strings on for a full month with heavy play. They are responsive and forgiving strings with wonderful clarity and feel? Core-Bond a 10 for tone, volume clarity and sustain." - Jerrame Smithers plays 5 nights a week.

"Until now, I thought the strings I used were the best strings ever made but quite honestly Core-Bond ™️  strings are even better. I took them off after approx. 25 hrs actual playing even though they still had plenty of life in them. I only took them off because I had a 3 hr gig to do and I didn't want to take any chances, however, I feel they still had at least 10 more hrs of life left in them. They still felt like new and had no discernible loss of tone. I seriously rank them at 10+ and when they become available they will be my string of choice for sure! Whoever designed these strings is a GOD!"- Mark Knapp plays national shows all over the United States.

"The acoustic strings seemed very warm compared to other sets I've used. The electric strings seemed stiff for a lighter gauge at first. It didn't take long for the strings to settle in and hold tune very well. Good sustain and tone. I would purchase these strings. The electric got a good workout in the last few days. I have a tuner on my guitar, I randomly would return to alternate tuning and back. The strings were tuned to 12 different tunings several times. Always settled in tune and held regardless of the shifting around. I've had over 2 months of play on them and don't want to take them off until they break. They sound fantastic" Michael Carr plays a Gibson Les Paul and Ovation Balladeer. 

"The strings are great, especially the strong tone through the guitar pickups. The strings have been on my guitar from Oct 2017 to March 2018. 5 Months and they still hold their tone with no corrosion or loss of tone." Terry Lauderdale tours with a Charvel Pro-Mod San Dimas. 

COPYRIGHT 2018 - Core-Bond ™️ by Sfarzo Guitar String Company LLC - IMAGES AND WRITTEN CONTENT USE ON THIS WEBSITE MAY NOT BE REPRODUCED WITHOUT WRITTEN PERMISSION AND CONSENT - CONTACT: INFO@SFARZOUS FOR GRANTED PERMISSION