Product Name: Direct Black 239
C.I. No.: 22580
CAS No.: 3626-23-1
Molecular Formula:C32H22N6Na2O8S2
Molecular Weight: 728.66
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Shade: Black.
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Direct Direct Black 239 Physical Properties and light fastness, solubility.
| Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Direct Black 239 | |
| Dyeing depth % | 2 |
| Insolubles % | 0.15 |
| Light Fastness | 4 |
| Washing Fatness | 2 |
| Rubbing fastness(dry) | 4 |
| Rubbing fastness(wet) | 3 |
Direct Direct Black 239 Properties: blue ash. Soluble in water (for violet black) and soluble fiber element, slightly soluble in ethanol is shallow purple, insoluble in other organic solvents. The strong sulfuric acid in blue, diluted for purple, have precipitation. The dye solution to join strong hydrochloric acid for dark, precipitation; Add thick sodium hydroxide solution for purplish red color, have precipitation.
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Note:Â The data contained here are based on our current knowledge and experience. It is the responsibility of user to test our products before the final application.
EXHIBITIONS PHOTOS:
FACTORY PHOTOS:
Diamond Lapidary Grinder and Saw
A lapidary machine adapted to produce cabochon shaped gem stones or the like; the machine having a powered rotary grinding wheel provided with a contoured in cross section annular grinding surface adapted to grind peripheries of cabochon shaped gem stones; a powered rotary dop holding shaft structure adapted rotatably to carry a dop supported gem stone in contact with said annular grinding surface; said shaft structure axially parallel to and laterally movable relative to the rotary axis of said grinding wheel, said shaft structure having a generally oval shaped cam thereon; a normally stationary idler roller having a periphery engagable by said cam and means for adjusting the position of the periphery of said idler roller in directions laterally relative to the rotary axis of said shaft structure in order to progressively cut peripheries of stones down and to produce cabochon shaped stones of various overall sizes.
Our 6inch 8inch Lapidary Combination Unit Cabbing Grinder Polisher Machine with 1"stainless steel shafts and ball earings,7pcs Aluminums Spacers and Flanges and locknut It also has a 3/4HP Thermal protected ball bearing motor, the Hood process by 304 stainless steel.The Cover has two U-Slot for easy remove. We also can supply a adjustable drip water system with 8 shut off valves for each wheel. The shaft is tapped for a ¼-20 spin-on polish head at right ends and tapped for a 1/2" Aluminum lap or Diamond Facet Laps at left ends. Accepts silicon carbide or diamond wheels or rubber expandable drums.
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Hans Super Abrasive Diamond Tool Co.,Ltd , https://www.hansuperabrasive.com