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GARDCO
S90 Zahn Signature Dip Viscosity Cups
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Avoid viscosity problems with regular checks, using an S90 Zahn Signature Dip Viscosity Cup (a pH Meter used in combination with the Zahn Cup will go a long way towards improving print quality).
Read our newest viscosity article on FlexoExchange:
Measuring Viscosity with a Zahn cup? Use Centistokes, not just Seconds!
S90/Zahn Signature dip Viscosity cups are an improved version of the time honored Zahn Signature viscosity cups. GARDCO is the only producer authorized to use the Zahn name and has added the S90 designation to identify the improved viscosity cups manufactured on new state-of-the-art equipment to ensure optimum quality and uniformity. Calibration of the S90/Zahn cups match the earlier Zahn Signature cups. Conversion formulas and tables relating cup efflux time in seconds to viscosity in centistokes are identical for both series of Signature cups. S90/Zahn cups are calibrated with standard "G" series oils traceable to the National Institute of Standards & Technology. "G" series calibration oils are produced in accordance with ISO 9002.
- #1 - #5 Cups Available (most flexo inks are measured with a #2 or a #3)
- Monitor Ink Viscosity
- Maintain Print Quality
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Cup
Number
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Seconds Efflux Time
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Centistokes Range
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Oil used to Calibrate
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1
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31-60
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15-78
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G-20
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2
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19-60
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39-238
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G-60
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3
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11-60
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63-604
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G-100
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4
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10-60
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97-899
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G-350
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5
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10-60
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219-1627
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G-350
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GARDCO
EZ Zahn Dip Viscosity Cups
3% Guaranteed Tolerance
Complies with and exceeds ASTM D 4212
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The new EZ Viscosity Cup Series is a logical and necessary outgrowth of the standardization studies on the Zahn Signature and similar cups for the promotion of this most popular type of viscosity measuring instrument as a national and international standard. Not only has this cup been improved with respect to earlier produced cups and designed to comply to the requirements of ASTM D 4212 but, in addition, each EZ Cup is furnished with a table which permits conversion between efflux time in seconds to the nearest tenth of a second to viscosity in centistokes. This table is particularly useful in determining efflux time in seconds when viscosity in centistokes is known.
For those users who require documented certification of their measuring equipment, the EZ™ cups may be ordered, at an additional charge, with a CERTIFICATE of CALIBRATION . This document contains not only information on actual cup calibration with standard oils traceable to the National Institute of Standards and Technology but in addition, this certification also complies to conditions and procedures under the requirements of ANSI/NCSL Z54O-1 or MIL-STD-45662A as applicable.
Additional Features:
- EZ Cup orifices are machined rather than drilled to insure exact centering in the cup hemisphere base and a minimum of burr formation. This insures an orifice of specified length and a correct symmetrical efflux stream.
- The EZ Cup support rods are offset from the side of the cup and secured to the cup sidewall below the cup rim. This eliminates errors due to test material drainage from support surfaces.
- The increased separation width of the support rods by over 20% and the lowering of weld to the cup provide best possible conditions for cleaning.
The EZ™ cups are produced to very close mechanical tolerance in elaborate jigs and fixtures. Such equipment not only insures that each cup is correctly produced but also that all cups are identical. All parts of the cup are of stainless steel except for the name plate. The table below provides operating range specifications, cup midrange sensitivity and recommended calibrating oils.
Most flexo inks are measured with a #2 or #3 cup.
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Cup Number
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Seconds Efflux Time
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Centistokes Range
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Oil used to Calibrate
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1
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40-60
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10-36
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G-10
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2
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20-60
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19 to 156
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G-60
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3
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12-60
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64 to 596
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G-200
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4
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10-60
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79-784
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G-200
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5
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10-60
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161-1401
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G-350
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¹ Stated as centistokes per second of efflux time.
² Centistoke values are nominal - actual values printed on labels
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