描述
MacDermid Alpha Micromax 5448 High-Conductivity Platable Carbon Paste for Sulfur-Proof Chip Terminations
Type: Platable Carbon Paste
Application: Sulfur-Proof Layer
Solids: 50–56%
Shelf Life: 3 months refrigerated
Micromax 5448 is a polymer-based, platable carbon paste applied over fired-on silver to provide a sulfur-proof layer for chip components. It offers excellent conductivity, excellent printed resolution, good adhesion on both fired silver and alumina substrates, and good platiability. Cadmium, lead, nickel, and phthalate free.
Micromax 5448 from MacDermid Alpha is a polymer-based, platable carbon paste printable on a variety of substrates. In chip component builds it is usually applied over fired-on silver, where it acts as a sulfur-proof layer. The composition offers excellent conductivity for a carbon paste, excellent printed resolution, and good adhesion on both fired silver and alumina substrates. Good platiability supports subsequent plating steps, which matters for chip terminations that go through electroplating. The formulation is cadmium, lead, nickel, and phthalate free.
The paste carries 50–56% solids and a viscosity range of 60–80 Pa.s. Micromax 9245 is the listed solvent or thinner. A 250 mesh screen is the recommended mask mesh. Store refrigerated at 0–5°C; room temperature storage is not recommended. Unopened shelf life is 3 months from date of shipment. Gradual polymerization with viscosity increase and mechanical separation can be expected over a few months. When refrigerated storage is used, allow the material to equilibrate to room temperature before opening to prevent moisture pickup from condensation. After containers are opened, use and storage conditions plus possible contamination make shelf limits unpredictable.
Genuine MacDermid Alpha Micromax Imported Stock & Technical Support
We hold regular stock of authentic MacDermid Alpha Micromax 5448 platable carbon conductive paste. Original factory TDS and batch-specific COA are available on request for your chip resistor programs.
Request Sample, TDS & Quotation
Complete TDS, COA, and regulatory documentation available
Key Features of MacDermid Alpha Micromax 5448
- Polymer-based, platable carbon conductive paste
- Applied over fired-on silver to provide a sulfur-proof layer for chip components
- Excellent conductivity for a carbon paste
- Excellent printed resolution for fine termination features
- Good adhesion on both fired silver and alumina substrates
- Good platiability for subsequent plating steps
- Cadmium, lead, nickel, and phthalate free (no intentional addition)
- Solids 50–56% for stable deposition
- Viscosity 60–80 Pa.s for consistent screen printing
- Mask mesh 250
- Thinner Micromax 9245
- Refrigerated storage at 0–5°C; 3-month shelf life unopened
Primary Applications
- Chip component sulfur protection — carbon layer over fired silver terminations
- Carbon paste conductor — per TDS application field
- Post-plating processes — where good platiability matters
- Alumina and fired silver substrates — where adhesion on both surfaces is required
Full Technical Specifications
| Property | Typical Value | TDS Reference |
| Product Type | Platable carbon conductive paste | TDS: Carbon Paste |
| Application | Carbon paste | TDS: Carbon paste |
| Solvent or Thinner | Micromax 9245 | TDS: Micromax 9245 |
| Solid Content | 50 to 56 % | TDS: 50 to 56 % |
| Viscosity | 60 to 80 Pa.s | TDS: 60 to 80 Pa.s |
| Mask Mesh | 250 | TDS: 250 |
| Conductivity | Excellent | TDS: Product benefits |
| Printed Resolution | Excellent | TDS: Product benefits |
| Adhesion | Good on both fired silver and alumina substrates | TDS: Product benefits |
| Platiability | Good | TDS: Product benefits |
| Cadmium, Lead, Nickel, Phthalate Free | Yes (no intentional addition) | TDS: Product benefits |
| Shelf Life | 3 months | TDS: 3 months |
| Storage Temperature | 0 to 5 °C refrigerated | TDS: 0°C – 5°C |
Note: All listed values are typical and may vary by batch. Values based on MacDermid Alpha official TDS. Independent qualification testing is required prior to production use. “Cadmium, Lead, Nickel and Phthalate free” as used herein means these substances are not intentional ingredients and are not intentionally added. Trace amounts may be present.
Recommended Processing Conditions
| Parameter | Recommended Value | TDS Reference |
| Mixing Prior to Use | Thoroughly mix to redisperse solids | TDS: thoroughly mix |
| Mask Mesh | 250 | TDS: 250 |
| Thinner | Micromax 9245 | TDS: Micromax 9245 |
| Refrigerated Storage | Store at 0–5°C; allow to equilibrate to room temperature before opening | TDS: 0°C – 5°C |
| Plating | Good platiability for subsequent plating steps | TDS: Product benefits |
Handling and Storage Recommendations
| Storage Rules | Store tightly sealed in a clean, stable environment at refrigerated temperature between 0°C and 5°C. Room temperature storage is not recommended. | TDS: 0°C – 5°C |
| Shelf Life | 3 months in unopened containers from date of shipment. | TDS: 3 months |
| Ageing Behavior | Gradual polymerization with viscosity increase and mechanical separation can be expected over a few months. | TDS: Storage and shelf life |
| Refrigerated Handling | Allow material to equilibrate to room temperature before opening to prevent moisture pickup from condensation. | TDS: Storage and shelf life |
| After Opening | Use and storage conditions plus possible contamination make shelf limits unpredictable after opening. | TDS: Storage and shelf life |
| Transportation | Under normal shipping conditions, no temperature control is expected. For extended transport periods, confirm product suitability. | TDS: normal shipping conditions |
Official Technical Documentation
| Document Type | Document Introduction | Document Request |
| TDS | MacDermid Alpha Micromax 5448 original factory technical data sheet | Request TDS |
| COA | Batch-specific certificate of analysis | Request COA |
| SDS | Safety Data Sheet for handling and storage | Request SDS |
Frequently Asked Questions
How does 5448 differ from 5440?
Both are platable carbon pastes used over fired silver for sulfur-proofing. 5448 adds excellent conductivity and excellent printed resolution, with a lower viscosity range of 60–80 Pa.s compared with 80–120 Pa.s for 5440. Solids content is also higher for 5448 at 50–56%.
Why is high conductivity important in a carbon paste?
Carbon pastes are generally lower in conductivity than silver pastes, so excellent conductivity from a carbon composition helps reduce resistance across the termination while still providing the sulfur-proof function.
How should 5448 be stored?
Store refrigerated at 0–5°C. Room temperature storage is not recommended. Allow the material to equilibrate to room temperature before opening to prevent moisture pickup from condensation. Unopened shelf life is 3 months.
What mesh size is recommended for 5448?
The TDS lists a mask mesh of 250. This supports fine resolution printing for chip component terminations.
Can 5448 be plated after curing?
Yes. The TDS lists good platiability as a product benefit, which means the cured carbon layer can go through plating processes for chip terminations.
Is 5448 free of cadmium, lead, nickel and phthalate?
Per the TDS, cadmium, lead, nickel, and phthalate are not intentional ingredients and are not intentionally added. Trace amounts may be present. Customers with strict compliance thresholds should verify against their own requirements.
What thinner should be used with 5448?
Micromax 9245 is the listed solvent or thinner. Using the recommended thinner helps keep viscosity and print behavior consistent with the TDS values.
Get MacDermid Alpha Micromax 5448 Bulk Pricing and Technical Support
We supply authentic MacDermid Alpha Micromax 5448 platable carbon conductive paste for chip resistor programs. Contact our team for bulk quotations, sample availability, technical documentation, and application support.
Inquire Bulk Price & Technical Support
Disclaimer: All technical data on this page are for general guidance only and are not product specifications. Buyers must carry out independent trials and verify suitability before bulk ordering. Actual values may vary between production lots. “Cadmium, Lead, Nickel and Phthalate free” as used herein means these substances are not intentional ingredients and are not intentionally added. Trace amounts may be present.
