Answers
May 29, 2022 - 06:09 AM
Q - What is the legacy binder and how does it differ from the Dragon/Phoenix binder. I am finding that the Centaur matrix is slicker and not as abrasive as the dragon type matrix type in the small Cerberus I ordered to test. Is any other stones available in this matrix? Does it matter in the Legacy binder?
Want to order wisely! Knife Maker.
A - The Legacy binder is used in the lower grit stones.
Initially (a few years back) the same "legacy" binder was used in all the Venev stones, including the finer grits, but it was found that it caused scratches and abrasion to a coarser level than the grit of the stones itself. Venev decided to develop a "OCB" new generation binder for the finer grit stones (400 and up) with no abrasive particles in the composition. This makes the finer grit Venev stones far better finishing stones.
Want to order wisely! Knife Maker.
A - The Legacy binder is used in the lower grit stones.
Initially (a few years back) the same "legacy" binder was used in all the Venev stones, including the finer grits, but it was found that it caused scratches and abrasion to a coarser level than the grit of the stones itself. Venev decided to develop a "OCB" new generation binder for the finer grit stones (400 and up) with no abrasive particles in the composition. This makes the finer grit Venev stones far better finishing stones.
Jun 23, 2022 - 01:39 AM
Venev uses two categories of the binder: legacy and OCB (or OSB). Legacy can be in two colors, and OCB can be in two colors. Colors are used solely for easy identification of sides in dual-sided stones.
The legacy binder is based on phenolic resin with boron carbide. In the beginning, legacy binder was used for all Venev resin diamonds. ("Legacy binder" came from Gritomatic because Venev call it "binder".)
Boron carbide in resin led to problems in fine sharpening because these particles were large and hard enough to create scratches on some steels. Venev developed experimental binders where boron carbide is replaced with soft "something". OCB gets picked and become official. (OCK is the one that became nothing.) Coarse grits don't feature OCB because legacy binder outperforms OCB. For business buyers, legacy binder is available for all grits up to F2000 (1/0), Gritomatic offers legacy up to F240, OCB F400, and above.
Colors in the legacy binder: 1) greenish dark gray - color of resin 2) dark copper with metallic reflection - actually copper coming not from binder as the description of Dragon says but from copper-diamond composite grains. Cu-Diamond substrate is intended for applications not related to knife sharpening, but Venev uses it as a dye. There is the opinion that copper may worsen performance. If it's true, copper-free series will have an advantage.
Colors in OCB binder: 1) yellow - color of resin (may be yellow dye) 2) red - red dye is added. I have not seen any evidence that dye pigments have negative effects.
P.S. Konstantin cares about the business and the customers just like before. Unfortunately, I had to delegate the customer support and communications to colleagues and focus on survival of the company after 80% of our supply chains were destroyed in one week.
The legacy binder is based on phenolic resin with boron carbide. In the beginning, legacy binder was used for all Venev resin diamonds. ("Legacy binder" came from Gritomatic because Venev call it "binder".)
Boron carbide in resin led to problems in fine sharpening because these particles were large and hard enough to create scratches on some steels. Venev developed experimental binders where boron carbide is replaced with soft "something". OCB gets picked and become official. (OCK is the one that became nothing.) Coarse grits don't feature OCB because legacy binder outperforms OCB. For business buyers, legacy binder is available for all grits up to F2000 (1/0), Gritomatic offers legacy up to F240, OCB F400, and above.
Colors in the legacy binder: 1) greenish dark gray - color of resin 2) dark copper with metallic reflection - actually copper coming not from binder as the description of Dragon says but from copper-diamond composite grains. Cu-Diamond substrate is intended for applications not related to knife sharpening, but Venev uses it as a dye. There is the opinion that copper may worsen performance. If it's true, copper-free series will have an advantage.
Colors in OCB binder: 1) yellow - color of resin (may be yellow dye) 2) red - red dye is added. I have not seen any evidence that dye pigments have negative effects.
P.S. Konstantin cares about the business and the customers just like before. Unfortunately, I had to delegate the customer support and communications to colleagues and focus on survival of the company after 80% of our supply chains were destroyed in one week.
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