Material & procurement guide
PLA vs PLA+: How to Choose Filament for Wholesale & OEM Orders
A distributor needs more than a simple answer to “which filament is stronger?” The useful question is which grade belongs in each part of the range, what claim the product label can support, and how the next order will match the approved sample. This guide compares WJ PLA Basic and WJ PLA+ using their own technical data sheets, then turns the comparison into a practical wholesale and private-label purchasing plan.
Quick answer for buyers
For wholesale and OEM stocking, position WJ PLA Basic for everyday models and appearance prototypes, and evaluate WJ PLA+ for indoor parts needing a different mechanical performance profile. WJ’s V1.0 TDS documents report higher typical tensile values for PLA+, but both list approximately 55°C HDT at ISO 75, 0.45 MPa. Compare the stated specimen conditions, approve application samples, and confirm colors, spool format, packaging and order criteria with WJ before purchasing.
1. Start with the role each grade plays
Use PLA Basic as a candidate for display models, classroom projects and prototypes checked primarily for appearance or fit. Evaluate PLA+ when customers want indoor enclosures, brackets or other lightly loaded parts and the application justifies reviewing mechanical behavior. Suitability still depends on the design and test result.
PLA+ is a product name, not a complete purchasing specification. Modified PLA formulations differ between suppliers. A successful profile for another brand’s PLA+ does not establish the settings or properties of WJ PLA+. Keep the exact grade attached to the TDS and the sample.
2. Compare actual WJ TDS entries
The table uses WJ-TDS-PLABASIC-001 and WJ-TDS-PLAPLUS-001, V1.0, issued August 1, 2026. Values are supplier-published typical references, not independent third-party results or batch acceptance guarantees. ISO 527 / GB/T 1040 applies to tensile entries; ISO 179 / GB/T 1043 to notched impact; ISO 75 at 0.45 MPa to HDT.
The two sheets use different bed temperatures and printing speeds for specimen preparation. The entries below compare reported values under those respective conditions, not a controlled test that changes only the material. Recommended printing ranges are starting points for sample trials.
| Entry | WJ PLA Basic | WJ PLA+ |
|---|---|---|
| Document | WJ-TDS-PLABASIC-001 · V1.0 | WJ-TDS-PLAPLUS-001 · V1.0 |
| Diameter / tolerance | 1.75 mm ± 0.02 mm | 1.75 mm ± 0.02 mm |
| Nozzle guidance | 190–230°C | 200–220°C |
| Bed guidance | 35–45°C | 60–70°C |
| Tensile strength X–Y · ISO 527 | ≈ 46 ± 4 MPa | ≈ 60 ± 5 MPa |
| Tensile strength Z · ISO 527 | ≈ 40 ± 4 MPa | ≈ 50 ± 4 MPa |
| Notched impact · ISO 179 | ≈ 3 kJ/m² | ≈ 3.5 kJ/m² |
| HDT · ISO 75 · 0.45 MPa | ≈ 55°C | ≈ 55°C |
| Specimen nozzle / bed / speed | 210°C / 40°C / 150 mm/s | 210°C / 65°C / 80 mm/s |
| Infill / layer / conditioning | 100% / 0.2 mm / 23°C, 50% RH, 24 h | 100% / 0.2 mm / 23°C, 50% RH, 24 h |
3. Read strength and toughness separately
The sheets report X–Y tensile strength of approximately 46 ± 4 MPa for PLA Basic and 60 ± 5 MPa for PLA+. Z-direction entries are approximately 40 ± 4 and 50 ± 4 MPa respectively. Preserve orientation and method when presenting these numbers; a flat specimen does not represent every printed part.
Tensile strength and impact resistance answer different questions. The cited notched-impact references are approximately 3 and 3.5 kJ/m². These entries do not prove a universal percentage improvement, longer part life or fewer returns. Check the geometry, color, profile and handling conditions relevant to your customers.
4. Do not sell the plus sign as heat resistance
Both WJ sheets list HDT of approximately 55°C at ISO 75, 0.45 MPa. This comparison does not support a claim that WJ PLA+ provides better heat resistance at that test load. HDT also does not establish a continuous service temperature for a finished part.
Prusa’s PLA guidance highlights the material family’s temperature limitations. For a hot environment or sustained loading, describe the actual conditions and assess another suitable grade with the supplier. A tougher formulation and a higher printing temperature do not, by themselves, validate a hot-use application.
5. Build a stock plan around demand and total cost
Separate the everyday range from the application-led range. Start with colors and spool formats your buyers already request; trial additional PLA+ variants against actual demand. There is no universal Basic-to-Plus stock ratio. Use sell-through, repeat inquiries, sample feedback and stock age to decide how much to reorder.
Compare quotations on the same net weight, color quantity, spool, label, protective packaging, destination and delivery terms. PLA+ is not automatically more expensive in every quote. Include freight, duties, storage, failed prints and customer support when evaluating total cost, without assuming unmeasured savings from either grade.
6. Approve a sample using the intended application
Use the same test geometry and evaluation method for both grades. Begin with each grade’s recommended profile and drying instructions, then record any changes. Check dimensions, feeding, surface finish and the specific handling or fit requirement rather than relying only on a visually attractive model.
Record printer, nozzle, slicer, build orientation, color, sample or batch reference and TDS revision. Compare samples from more than one spool if repeatability matters. Keep an approved physical reference and a written acceptance method; the TDS helps shortlist a material but does not replace application validation.
7. Send an OEM brief that supports repeat orders
WJ’s material pages and TDS documents provide the starting grade information. For an OEM inquiry, specify the intended customer segment, application, proposed colors and quantities. Request confirmation of available spool formats, label artwork, carton design, sample arrangements and project-specific minimum quantities.
Keep approved product names, TDS revisions and claims consistent across the label, website listing and purchase order. Confirm the order-specific acceptance checks and required documents before release, then use the agreed reference when reordering.
Procurement notes
| Range & application | Customer use, grade and approved claims. |
|---|---|
| Sample approval | Color, profile, test part and written criteria. |
| Spool & packaging | Net weight, spool format, labels and carton. |
| Order & repeatability | Quantity, destination, TDS revision and agreed checks. |