CMS flake viscosity test procedure and range checker

What is the confirmed KARN flake viscosity method

KARN measures the confirmed K5 K6 and K9 flake viscosity values on a 5 percent solution using an NDJ 8 rotational viscometer with spindle number 4 at 6 r min Each published range is plus or minus 10 percent from the nominal value

Which product form does this method cover

The values on this page apply only to the identified flake grades They do not define powder specifications and they do not confirm suitability for a textile printing process

How do you run the CMS flake viscosity test procedure

Keep the material and measurement record comparable before comparing a result with the published K5 K6 or K9 range

• Record the K5 K6 or K9 grade flake form sample or batch reference and the applicable document reference
• Prepare the published 5 percent solution and record the laboratory preparation conditions without assuming an unpublished temperature mixing or hydration rule
• Set the NDJ 8 rotational viscometer to spindle number 4 and 6 r min then record the reading temperature time calibration status and valid torque range
• Record the measured viscosity and compare it only with the matching grade range using plus or minus 10 percent from nominal
• Review comparability first if grade form concentration preparation instrument spindle speed temperature or reading procedure differs then confirm process fit through a representative printing trial

This sequence covers the comparison controls confirmed on this page It does not add an unverified mixing temperature hydration time or sample preparation condition Use the applicable current laboratory procedure and the selected grade TDS for those controls

Check a measured flake viscosity result

Choose the matching KARN flake grade and enter the measured viscosity only when all published test conditions are the same

• K5 Nominal 24000 mPa·s Confirmed range 21600 to 26400 mPa·s
• K6 Nominal 34000 mPa·s Confirmed range 30600 to 37400 mPa·s
• K9 Nominal 42000 mPa·s Confirmed range 37800 to 46200 mPa·s

This checker compares one number with the published flake range It does not validate powder material test preparation batch identity or printing suitability

Machine readable flake range data

Download the same confirmed flake values and test conditions for technical review procurement records and source verification

Download JSON reference data Download CSV range table

Confirmed flake viscosity values

Use the same grade form concentration instrument spindle and speed before comparing a result with the published range

Method parameters that must stay together

A viscosity number is not comparable when the material identity or measurement conditions differ

• Flake product form
• 5 percent solution
• NDJ 8 rotational viscometer
• Spindle number 4
• 6 r min
• Plus or minus 10 percent from nominal

Raw material solution or complete print paste

The published range is a controlled raw material solution result It does not represent the viscosity of the final print paste A complete paste also contains the dye alkali electrolyte or other auxiliaries used in the intended recipe and has its own preparation and holding conditions

Keep the raw solution result and the complete paste result as separate records For the paste record include the full recipe water mixing hydration relevant pH addition order holding time and measurement method so another team can reproduce the comparison

Independent context on viscosity and print quality A 1999 study of reactive print pastes reported that a viscosity measurement alone could not predict printability The study used laboratory prepared CMS samples and did not test KARN grades Bandyopadhyay Mukhopadhyay Afini Salaskar Acharekar Indian Journal of Fibre and Textile Research 1999 volume 24 issue 1 pages 49 to 57

What should be recorded for a cross supplier comparison

Agree one comparison basis before testing and keep these fields with each supplier sample so purchasing and laboratory teams can tell whether the results are comparable

• Supplier company and sample reference
• K5 K6 or K9 grade and powder or flake form
• Same laboratory preparation procedure and operator record
• Sample or batch reference and sample receipt condition
• Solution concentration and whether it uses as received material or dry solids
• Moisture result and any dry solids correction basis
• Water source specification and batch
• Mixing speed duration and hydration time
• Viscometer model spindle rotational speed and test temperature
• Container volume immersion depth and reading time
• Instrument calibration status and valid torque range
• Independent preparation count with individual results
• Mean variation and holding or recheck time
• Observed viscosity result
• Textile printing trial context

A supplier TDS value is not directly comparable unless the grade form concentration basis and measurement record are known Confirm any missing method detail before ranking samples

What a viscosity only supplier quotation still needs

A single mPa·s value becomes a procurement record only when the supplier also identifies the material and the method that produced it Use the same request with every sample so commercial and laboratory teams can see whether the numbers and the products are comparable

• Supplier grade raw starch source degree of substitution pH and moisture result
• The separate test methods used for degree of substitution pH and moisture where applicable
• Requested powder or flake form with sample or batch reference
• Nominal viscosity accepted range or tolerance and whether any figure applies as received or on dry solids
• Solution concentration water preparation mixing hydration time and test temperature
• Viscometer model spindle speed valid torque range reading time and calibration status
• Textile printing evidence kept separate from the raw solution viscosity result

Do not rank suppliers from viscosity alone If the raw material degree of substitution form concentration or method is missing ask for it before treating the quotation as a comparable specification

What this page does not confirm

This method page is not a TDS SDS COA batch record or grade suitability approval Request the current document for the selected grade and form before a production decision