APPLICATION 02
Carboxymethyl Starch for Burn Out Printing
Burn out printing combines the thickener paste with an acid system that attacks one fibre of a blended fabric so paste compatibility and clean wash off decide the result When evaluating carboxymethyl starch for this process share the fibre construction acid system recipe required powder or flake form and target viscosity KARN will use this information to arrange sample and TDS confirmation no grade is pre assigned on this page
How to evaluate carboxymethyl starch for burn out printing
For burn out printing the thickener paste works together with an acid system on a blended fabric so evaluate CMS for compatibility with that acid system definition of the burned out motif and clean wash off Prepare a trial with the actual fibre construction and recipe record whether powder or flake is required and the target viscosity or test method Grades K5 K6 or K9 differ in raw material DS level and confirmed viscosity range the final grade and form require a representative sample and the current TDS
Process suitability
- Record the fibre construction and acid system
- Check paste compatibility on the actual fabric blend
- Confirm wash off and motif definition before production
CMS grades available for confirmation
Listing does not confirm suitability for this process Validate the grade with a sample and the current TDS
Continue the CMS procurement evaluation
Burn out evaluation information to send
- Candidate K6 K5 K9 grade or grade not yet selected
- Raw material DS and sample or batch reference
- Powder or flake form
- Actual fabric construction and the fibre intended to be removed
- Measured fibre blend ratio and representative fabric sample
- Acid or acid donor system identity and concentration where disclosure is possible
- Complete burn out paste recipe context including CMS loading and other auxiliaries
- Target paste viscosity and the measured CMS result with its method
- Paste preparation water mixing hydration handling and measurement conditions
- Actual print method and screen or equipment conditions
- Fixation route and actual temperature time and steam or heat exposure where used
- Wash off neutralization if used and finishing sequence
- Current observations for fibre removal motif edge definition residual fibre fabric handle and equipment compatibility
- Acceptance criteria and the procurement decision the trial must support
Independent burn out process context
This Cotton Incorporated technical bulletin explains the general burn out process for cotton and polyester blends It is background context and does not test KARN grades or prove process suitability
- Printing of Pigments and Special EffectsCotton Incorporated Technical Bulletin ISP 1017 Copyright 2007Read the Cotton Incorporated PDF
The bulletin states that strong mineral acids or acid salts can destroy cellulose fibres in a cotton polyester blend and that the process requires special screens and special care in handling
What the source does not establish
The bulletin describes a corrosive acid based process on cotton polyester blends and does not test KARN CMS It does not show that K5 K6 or K9 or any listed paste loading is suitable for a specific fibre blend formulation machine or fixation route Keep the actual buyer conditions on the trial record instead of treating a literature example as a KARN protocol