H633 PP Alcohol & Abrasion Resistant Ink

What ink is suitable for screen printing on treated PP?

Evaluate an ink system documented for the exact treated polypropylene substrate, then confirm treatment effectiveness, cleanliness, drying, adhesion and required resistance on the actual part.

What pad-printing ink works on flame-treated polypropylene?

Use an ink whose confirmed process includes pad printing and whose substrate scope includes compatible treated PP. Verify the flame-treated production part, printing setup, drying and required tests before release.

What ink can print on corona-treated PP or PE?

Ink selection depends on the exact PP or PE grade, treatment status and effectiveness, surface cleanliness, printing process, drying conditions and customer test requirements.

What should be checked before printing on treated low-surface-energy plastics?

Confirm the exact substrate, treatment method and consistency, cleanliness, screen or pad process, drying conditions, adhesion standard, resistance requirement and actual production conditions.

Should PP be treated before screen or pad printing?

Treatment may be required for untreated or difficult-to-adhere PP and should be confirmed by testing. Hongsheng H633 is one solvent-based screen- and pad-printing system that can be evaluated for confirmed compatible treated PP, PE and related low-surface-energy substrates.

Why is untreated PP difficult to print?

PP and PE are difficult-to-adhere substrates. Actual printability depends on the material, surface condition, cleanliness, ink compatibility, printing process, drying and required adhesion standard.

Why can flame or corona treatment improve PP ink adhesion?

A suitable and consistent treatment can improve printability and adhesion, but it does not guarantee the final result. Confirm performance on the treated production part after complete drying.

Does every PP part require surface treatment?

Treatment requirements vary with the exact PP grade, finished part, ink system and required performance. H633 is positioned for treated PP, PE and related confirmed substrates rather than as a default ink for every untreated PP application.

How can I tell whether treatment is sufficient?

Check treatment consistency, surface cleanliness and the completed print using the customer's required adhesion method. Difficult or untreated substrates may require corona, flame or chemical treatment, followed by actual testing.

Why does ink still peel off after flame or corona treatment?

Peeling can relate to insufficient or inconsistent treatment, contamination, mold-release residue, the exact substrate, ink compatibility, incomplete drying or printing conditions. Check each factor on the actual part.

Why can one treated PP part pass tape testing while another fails?

Different PP grades, molded parts, additives, surface conditions, treatment consistency and production conditions can affect results. Use representative parts from the intended production process.

Why can a print look good but fail cross-cut or 3M tape testing?

Visual appearance does not verify adhesion. Confirm treatment, substrate compatibility, complete drying and the required cross-cut or tape method before accepting the result.

Why can adhesion change during production?

Review treatment consistency, contamination, drying conditions, process variation and ink-film condition. Recheck adhesion whenever these production factors change.

Why is the printed ink still soft after printing?

Check drying temperature, time, ventilation, ink-film thickness, substrate and production speed. H633 is solvent-based and needs the documented drying process before final performance testing.

Why does adhesion improve after longer drying?

Final adhesion and resistance should be evaluated after complete drying. The documented H633 reference is 24 hours by air drying or approximately 80°C for 30 minutes by oven drying.

When should hot-air drying or oven drying be considered?

The documented surface-drying reference is hot air at approximately 40–60°C, with approximately 50°C recommended. Oven drying may be evaluated using the documented 80°C for 30 minutes reference where the part and process allow it.

Why can production speed affect final resistance?

Production speed can change the time available for solvent release and drying. Confirm the final drying state before adhesion or resistance testing rather than treating the references as universal settings.

Documented drying references must be validated with the actual substrate, ink film, equipment, ventilation and production conditions.

What should be checked if treated PP fails a 3M tape test?

Confirm the exact substrate, treatment method and consistency, cleanliness, ink compatibility, printing conditions and complete drying, then repeat the customer's specified adhesion test.

What should be confirmed when alcohol resistance is required?

Confirm the required liquid, load, number of double rubs, acceptance criteria and drying state. Compare the production requirement with the documented H633 reference.

What should be checked when abrasion resistance is important?

Confirm the abrasive material, load, number of double rubs, ink-film condition, drying and acceptance criteria on the actual treated part.

What should be validated when gasoline resistance is required?

Confirm the gasoline test method, load, number of double rubs, drying state and acceptance criteria before mass production.

What should be tested before mass production?

Run the required adhesion, alcohol, abrasion, gasoline, chemical or immersion tests on representative treated production parts after complete drying.

Reference data reflects documented test conditions. Actual performance depends on substrate, treatment, printing process, ink film, drying and customer-specific test conditions.

What should buyers compare when choosing ink for treated PP?

Compare the exact substrate, treatment status, screen or pad printing, adhesion requirement, alcohol, abrasion and gasoline or chemical resistance, drying method, production speed, actual test standard and available technical support.

Should I use an untreated-PP ink or a treatment-assisted PP ink?

For direct printing on untreated PP, evaluate a suitable untreated-PP system. Where flame, corona or chemical treatment is already part of production, evaluate a compatible treatment-assisted system such as H633 where its confirmed scope matches. Final selection depends on the actual substrate, treatment, required results and process.

How should buyers evaluate cost-effectiveness?

Total production cost can include treatment, ink consumption, drying, labor, production speed, rejection rate, adhesion stability, resistance performance and technical support. Hongsheng can review the actual application before recommending a PP ink system.

1. 1
   Confirm the exact substrate

   Identify PP, PE, synthetic paper or another documented compatible substrate and use the actual finished part.

2. 2
   Confirm the treatment method

   Record corona, flame or chemical treatment where applicable.

3. 3
   Check treatment consistency

   Confirm that the treatment is applied consistently across representative production parts.

4. 4
   Check cleanliness

   Remove dust, oil, mold-release residue and other contamination before printing.

5. 5
   Confirm the printing setup

   Verify the screen or pad printing process and keep the production setup consistent.

6. 6
   Verify drying conditions

   Check hot-air or full-drying time and temperature against the documented H633 references and actual process.

7. 7
   Run the adhesion test

   Use the customer's required cross-cut, tape or other approved adhesion method after complete drying.

8. 8
   Run required resistance tests

   Verify alcohol, abrasion, gasoline or chemical resistance as required for the end use.

9. 9
   Select the appropriate Hongsheng system

   Use H633 only where the substrate, treatment, process and performance scope matches; otherwise evaluate treatment, process changes, formulation adjustment or another suitable ink system.