H636 Abrasion-Resistant Plastic Ink

What ink is suitable for screen printing on plastic parts?

Select the ink using the exact resin, molded part, surface condition, drying process, adhesion requirement and durability tests. H636 can be evaluated for its confirmed plastic range using screen printing.

What pad-printing ink should be considered when abrasion resistance matters?

Evaluate an ink documented for pad printing and the required wear test on the actual part. H636 supports pad printing and has a documented abrasion reference, but customer-specific handling and wear conditions still require validation.

What ink should be considered when printed plastic needs alcohol resistance?

Confirm the exact substrate, complete drying, alcohol type and customer test method before selection. H636 has documented alcohol-rub performance within its confirmed substrate and process scope.

What should be checked before choosing ink for molded plastic parts?

Identify the resin and grade where known, actual molded part, additives or surface treatment, mold-release residue, printing method, drying setup, ink color and required adhesion, alcohol and abrasion tests.

Why does ink performance vary between different plastic parts?

Plastic is not one uniform printing surface. Resin, grade, additives, molding conditions, surface condition and contamination can change adhesion and durability, so representative finished parts should be tested.

Why does ink peel off plastic after printing?

Possible factors include the exact resin, substrate compatibility, surface condition, contamination or mold-release residue, incomplete drying, ink deposit and printing conditions. Diagnose the complete application rather than assuming one cause.

Why can the same ink work on one plastic part but fail on another?

Different resin types, grades, additives, molded parts and surface conditions may behave differently. Approval should be based on the actual production part rather than only a generic material name.

Why can a print look good but fail a tape or cross-cut adhesion test?

Visual appearance does not verify adhesion. Confirm substrate compatibility, surface cleanliness, complete drying and the required customer adhesion method.

Why can adhesion change during production?

Review substrate variation, contamination, mold-release residue, ink preparation, print deposit, drying conditions and process consistency. Control these variables before changing the ink system.

Why does printed plastic soften or lose color during alcohol rubbing?

Review the exact resin, ink system, ink-film condition, complete drying, alcohol type or concentration, applied load, rubbing method, cycle count and pass/fail standard. No single factor explains every failure.

Why can adhesion pass while alcohol resistance fails?

Adhesion and alcohol resistance measure different performance. A film can remain attached to the plastic yet soften, mark or change under the specified alcohol-rub condition.

What affects alcohol resistance after printing?

The result can depend on substrate compatibility, ink-film deposit, complete drying, test timing and the exact customer method. Compare those conditions with the documented H636 reference.

Why should alcohol testing be done only after sufficient drying?

Testing before the film has fully dried may not represent final documented performance. H636's reference full-drying condition is 24 hours of air drying or 80°C oven curing for 30 minutes.

What information should buyers provide when alcohol resistance is required?

Provide the exact part and resin, drying process, alcohol type or concentration, load, rubbing method, number of double rubs and acceptance criteria.

Why does screen-printed plastic scratch easily?

Check substrate compatibility, surface contamination, ink deposit, complete drying and the actual contact or wear mechanism. The required scratch or wear method should match the end-use risk.

Why can a print pass adhesion but fail abrasion testing?

Good adhesion does not automatically provide good abrasion resistance. The film may remain attached while its surface wears under rubbing, load or handling.

Why does printed plastic wear during handling or assembly?

Repeated contact, fixtures, packaging, assembly steps and end-use handling can create wear conditions different from an adhesion test. Reproduce the relevant contact condition when evaluating the part.

What should be checked when abrasion resistance is important?

Confirm the exact substrate, ink-film condition, complete drying, printing process, abrasive material, applied load, rubbing method, cycle count and customer durability standard.

Why is the ink still soft after printing?

Review thinner selection, ink-film thickness, substrate temperature, ambient temperature, ventilation and elapsed drying time. H636 drying varies with the substrate, film thickness, temperature and ventilation.

Why can abrasion resistance improve after complete drying?

A partially dried film may not yet represent the documented resistance condition. Complete the intended drying schedule before final abrasion evaluation.

Why can alcohol resistance be poor when tested too early?

Early testing can challenge a film before full drying. Use the documented drying reference or a validated production schedule before comparing alcohol-rub results.

Why does production speed affect final performance?

Faster throughput can reduce available flash-off or drying time and may change ink deposit or ventilation conditions. Confirm that the complete production process delivers the required dry film.

What drying information should be confirmed before final testing?

Record surface-drying conditions, full-drying method, temperature, time, ventilation, substrate temperature, film thickness and the interval before testing. H636 documents hot-air surface drying at 40–60°C and full drying by 24-hour air drying or 80°C oven curing for 30 minutes.

What should be checked if plastic ink fails a tape adhesion test?

Confirm the exact resin and grade, surface condition, contamination, ink compatibility, ink deposit, complete drying and test timing, then repeat the required cross-cut and tape method.

What should be checked if alcohol resistance is insufficient?

Compare the actual substrate, full-drying process, ink-film condition, alcohol, load, rubbing method and cycle count with the documented reference and customer requirement.

What should be checked if abrasion resistance is insufficient?

Confirm complete drying, substrate compatibility, ink deposit, abrasive material, applied load, rubbing method, number of cycles and the relevant handling conditions.

Can good adhesion guarantee alcohol resistance?

No. Adhesion, alcohol resistance and abrasion resistance are separate requirements and should be tested independently using the required methods.

What should be validated before mass production?

Follow the sequence: customer requirement, exact substrate, controlled printing and drying, documented H636 reference, customer-specific adhesion and durability tests, and actual-part approval.

Reference data reflects documented H636 test conditions. Actual performance depends on the substrate, ink-film condition, drying, printing process and customer-specific requirements.

When should buyers consider a more durable plastic printing ink instead of a standard plastic ink?

A standard system may be sufficient for basic printing and adhesion. Evaluate a durability-focused system when the part also faces frequent handling, alcohol wiping, abrasion, wear or customer-specific resistance testing.

What should buyers compare when choosing durable plastic printing ink?

Compare the exact substrate, screen or pad process, adhesion, alcohol and abrasion requirements, drying process, handling conditions, end use, customer test standard and available technical support.

How should buyers evaluate cost-effectiveness?

Total production cost can include ink consumption, drying time, throughput, rejection, rework, alcohol-test failures, abrasion failures, process consistency and technical support. Hongsheng can review the actual application before recommending H636 or another suitable plastic ink system.

1. 1
   Identify the exact resin

   Confirm rigid or flexible PVC, PMMA, ABS, PC or PS within the documented H636 scope.

2. 2
   Confirm the actual molded part

   Record the material grade, additives and molding information where known.

3. 3
   Check surface condition

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

4. 4
   Confirm the printing setup

   Verify the screen-printing or pad-printing process, ink deposit and production consistency.

5. 5
   Verify drying

   Confirm surface drying and the complete air-drying or oven-curing schedule before testing.

6. 6
   Test adhesion

   Use the required cross-cut, tape or customer-specific method on the actual part.

7. 7
   Test alcohol resistance

   Use the customer's specified alcohol, load, rubbing method, cycle count and acceptance standard.

8. 8
   Test abrasion resistance

   Use the customer's specified abrasive, load, rubbing method, cycle count and acceptance standard.

9. 9
   Select the appropriate Hongsheng system

   Use H636 only where the substrate, process and verified durability scope fit; otherwise request evaluation of another suitable plastic ink system or formulation.