CMS grade comparison and print trial guide

How to compare CMS grades before a print trial

Use verified grade identity to narrow the sample request then build evidence through measurement and printing trials Raw material degree of substitution and one viscosity result do not create a complete performance ranking

Start with verified grade identity

K6 is high viscosity tapioca CMS with DS 0.4 K5 is standard tapioca CMS with DS 0.3 K9 is potato CMS with DS 0.4 Each grade is available in powder and flake form These facts identify the grade range and should accompany every sample request

Match the form and measurement conditions

Published numerical viscosity ranges apply only to the identified flake grades using a 5 percent solution on an NDJ 8 viscometer with spindle number 4 at 6 r min and a ±10 percent tolerance from nominal Do not transfer a flake result to powder Confirm powder specifications in the current TDS

How to structure a fair powder and flake comparison

Start with the same KARN grade and keep the sample reference printing process fabric recipe water mixing screen speed fixation and washing procedure in one record If dry material is the agreed comparison basis use the current controlled data rather than assuming both forms have the same moisture

• Equal CMS input Compare a documented equal CMS input basis under the same preparation route to identify hydration and viscosity response differences
• Equal target paste viscosity Adjust each form separately until it reaches the same target paste viscosity then compare actual usage print result and usable paste yield

Record hydration lumps filtration viscosity method actual CMS input recipe compatibility print definition color yield wash off and hand feel Compare confirmed prices with trial based usage and usable paste yield rather than unit price alone

Do not treat dust handling unit price or higher solution viscosity as proof of better printing performance until both forms are confirmed for the actual grade and process

How to record a fair CMS sample comparison

Record a fair comparison by defining one question coding samples before evaluation predefining acceptance observations controlling order and repetition recording operators and deviations and retaining traceable samples Keep the sample key controlled so expectations do not influence the result

1. Define one comparison set Compare one defined question at a time A same grade and form sample set from multiple suppliers is different from a powder and flake comparison within one grade Do not create one ranking across different grades forms or printing processes without separate evidence
2. Code samples before evaluation Assign neutral sample IDs before the trial and keep the supplier grade and form key separate from the evaluator until the observations are recorded Carry the same ID onto the preparation sheet print sample and retained sample
3. Predefine acceptance observations Set the pass or fail and ranking observations before seeing the results Cover paste preparation viscosity method print definition penetration colour yield wash off and handle as applicable to the process Record the scale used
4. Control order and repetition Use a planned balanced or randomised test order Repeat independent preparations or print runs and record every result and the actual order Do not report only the best run or pool changed conditions into one average
5. Record operators and deviations Record the operator equipment water fabric recipe target viscosity and process conditions for every run Note each deviation from plan Observations from changed conditions should remain separate
6. Keep a traceable retention set Retain a sealed material sample and a labelled printed reference for each coded sample Record the supplier grade form batch or sample reference receipt date storage condition and trial IDs

This record supports a purchasing decision but does not prove supplier approval grade suitability shelf life regulatory status or production performance Confirm the current TDS SDS and commercial terms separately for the selected grade and form

Open the CMS procurement worksheets Prepare the sample and TDS request

Evaluate through four evidence stages

Keep the process fabric recipe grade form sample reference and each result in one record Change one controlled factor at a time

1. Material record Record grade raw material DS powder or flake form sample or batch reference and the current document set
2. Prepared paste Record the dispersion and preparation route viscosity measurement conditions filtration observations and holding time used for the trial
3. Printing application Record compatibility with the actual printing recipe target viscosity behaviour and process conditions for discharge burn out disperse or reactive printing
4. Printed result Record process relevant observations on the representative fabric alongside wash off or finishing results and the procurement decision Do not treat one trial as permanent approval

What the comparison does not prove

A higher DS a higher nominal viscosity or a different raw material does not pre approve a grade for a printing process A single viscosity result cannot establish screen passage print definition holding stability or finished fabric quality Confirm the final grade form specification and process fit with a representative trial and the current KARN TDS

Compare grade identity before print performance

Compare K6 K5 and K9 by verified raw material degree of substitution and available form then evaluate the requested sample in the intended textile printing process Final suitability remains subject to a representative trial and the current KARN TDS

How we confirm the grade

• 01 Define the printing process Share the fabric recipe and target result for technical review
• 02 Compare the raw material route Start with K6 or K5 tapioca CMS and K9 potato CMS
• 03 Validate the grade Confirm product form specifications and process suitability with a sample and current TDS

Continue the application evaluation

Compare K6 K5 K9 product facts Check the flake viscosity method Prepare a sample and TDS request Open the CMS procurement worksheets

Download the bilingual CMS sample evaluation worksheet