描述
MacDermid Alpha Micromax 5478 High-Viscosity Green Laser-Trimmable G1 Glass Encapsulant for Thick Prints
Type: G1 Glass Encapsulant
Application: Chip Resistor
Color: Green
Solids: 72–80%
Shelf Life: 6 months
Micromax 5478 is a screen printable, laser trimmable, air-fired G1 glass encapsulant for chip resistors. It features higher viscosity for thick prints, acid resistance that withstands acidic nickel plating conditions, and a green laser-trimmable film. Lead, cadmium, nickel, and phthalate free.
Micromax 5478 from MacDermid Alpha is a screen printable, laser trimmable, air-fired G1 glass encapsulant developed for chip resistors. It is formulated with a higher viscosity than standard G1 encapsulants, allowing thicker prints in a single application and giving a fired thickness of 11–12 μm. The encapsulant is green colored and laser trimmable, supporting post-fire resistor adjustment. It is acid resistant and withstands acidic nickel plating conditions, which matters when the encapsulated resistor goes through subsequent plating steps. The formulation is lead, cadmium, nickel, and phthalate free.
The paste carries 72–80% solids and a viscosity range of 300–400 Pa.s. Micromax 8218 is the listed solvent or thinner. Print with a 250 mesh stainless steel screen to a dried thickness of 18–20 μm, giving a fired thickness of 11–12 μm. Mix thoroughly before use by slow, gentle hand stirring 1–2 minutes with a clean burr-free spatula, taking care to avoid air bubble entrapment. Allow prints to level at room temperature for 5–10 minutes, then dry at 150°C for 10 minutes. Fire in a belt furnace on a 30-minute cycle with a peak temperature of 600–620°C for 5–10 minutes. Store sealed at 5–30°C; unopened shelf life is 6 months.
Genuine MacDermid Alpha Micromax Imported Stock & Technical Support
We hold regular stock of authentic MacDermid Alpha Micromax 5478 G1 glass encapsulant paste. Original factory TDS and batch-specific COA are available on request for your chip resistor programs.
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Complete TDS, COA, and regulatory documentation available
Key Features of MacDermid Alpha Micromax 5478
- Screen printable, laser trimmable, air-fired G1 glass encapsulant for chip resistors
- Higher viscosity for thick prints in a single pass
- Green colored and laser trimmable for post-fire trimming
- Acid resistant and withstands acidic nickel plating conditions
- Lead, cadmium, nickel, and phthalate free (no intentional addition)
- Solids 72–80% for higher film build
- Viscosity 300–400 Pa.s for thick print deposition
- Screen: 250 mesh stainless steel; dried thickness 18–20 μm
- Fired thickness 11–12 μm
- Drying: 150°C for 10 minutes
- Firing: 30-minute cycle, peak 600–620°C for 5–10 minutes
- Thinner Micromax 8218
Primary Applications
- Chip resistor glass encapsulation — G1 encapsulant over resistor body
- Thick encapsulation layers — higher viscosity supports single-pass thick films
- Laser trimming lines — green laser-trimmable encapsulant
- Acidic nickel plating lines — where encapsulation must resist plating chemistry
Full Technical Specifications
| Property | Typical Value | TDS Reference |
| Product Type | Laser trimmable G1 glass encapsulant for chip resistors | TDS: Glass Encapsulant |
| Application | Encapsulant | TDS: Encapsulant |
| Color | Green | TDS: Green |
| Solvent or Thinner | Micromax 8218 | TDS: Micromax 8218 |
| Solid Content | 72 to 80 % | TDS: 72 to 80 % |
| Viscosity | 300 to 400 Pa.s | TDS: Brookfield HBT, UC&SP, 10 rpm |
| Mask Mesh | 250 | TDS: 250 |
| Printing Screen | 250 mesh stainless steel | TDS: 250-mesh stainless steel |
| Dried Thickness | 18 to 20 μm | TDS: 18-20 μm dried |
| Fired Thickness | 11 to 12 μm | TDS: 11-12 μm fired |
| Leveling Time | 5 to 10 minutes at room temperature | TDS: 5-10 minutes |
| Drying Schedule | 10 minutes at 150°C | TDS: 10 minutes at 150°C |
| Firing Peak Temperature | 600 to 620 °C | TDS: 600-620°C |
| Firing Peak Hold | 5 to 10 minutes | TDS: 5-10 min |
| Total Firing Cycle | 30 minutes | TDS: 30-minute cycle |
| Acid Resistance | Withstands acidic nickel plating conditions | TDS: Product benefits |
| Laser Trimmable | Yes | TDS: Product benefits |
| Lead, Cadmium, Nickel, Phthalate Free | Yes (no intentional addition) | TDS: Product benefits |
| Shelf Life | 6 months | TDS: 6 months |
| Storage Temperature | 5 – 30 °C | TDS: 5°C – 30°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. “Lead, Cadmium, 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 | Slow, gentle hand stirring 1–2 minutes with a clean burr-free spatula; avoid air bubble entrapment | TDS: 1-2 minutes |
| Printing Screen | 250 mesh stainless steel | TDS: 250-mesh stainless steel |
| Dried / Fired Thickness | Dried 18–20 μm; fired 11–12 μm | TDS: 18-20 μm dried / 11-12 μm fired |
| Leveling | 5–10 minutes at room temperature | TDS: 5-10 minutes |
| Drying | 150°C for 10 minutes | TDS: 150°C for 10 min |
| Firing | 30-minute cycle, peak 600–620°C for 5–10 minutes, belt furnace | TDS: 600-620°C, 5-10 min, 30 min cycle |
| Thinner | Micromax 8218 | TDS: Micromax 8218 |
Handling and Storage Recommendations
| Storage Rules | Store tightly sealed in a clean, stable environment at 5-30°C. | TDS: 5°C – 30°C |
| Shelf Life | 6 months in unopened containers from date of shipment. | TDS: 6 months |
| Pre-use Preparation | Thoroughly mix prior to use. Some settling of solids may occur during storage. | TDS: thoroughly mix |
| 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 5478 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
Why does 5478 use a higher viscosity than 5477?
The TDS lists higher viscosity for thick prints as a product benefit. With viscosity 300–400 Pa.s and solids 72–80%, 5478 builds a thicker film in a single pass than 5477, giving a fired thickness of 11–12 μm instead of 8–9 μm.
Is 5478 laser trimmable like 5477?
Yes. The TDS lists 5478 as a laser trimmable G1 glass encapsulant with green color. Post-fire laser trimming works the same way as on 5477, but on a thicker fired film.
How does 5478 withstand acidic nickel plating?
The TDS lists acid resistance and the ability to withstand acidic nickel plating conditions as product benefits. This matters when the encapsulated resistor goes through plating after firing.
What dried and fired thickness should I target for 5478?
Print to a dried thickness of 18–20 μm using a 250 mesh stainless steel screen. That yields a fired thickness of 11–12 μm, thicker than standard G1 encapsulants for extra protection.
How should 5478 be mixed before printing?
Slow, gentle hand stirring with a clean burr-free spatula (flexible plastic or stainless steel) for 1–2 minutes. Take care to avoid air bubble entrapment during mixing.
Is 5478 free of lead, cadmium, nickel and phthalate?
Per the TDS, lead, cadmium, 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 5478?
Micromax 8218 is the listed solvent or thinner. Using the recommended thinner helps keep viscosity and print behavior consistent with the TDS values.
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We supply authentic MacDermid Alpha Micromax 5478 G1 glass encapsulant paste for chip resistor programs. Contact our team for bulk quotations, sample availability, technical documentation, and application support.
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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. “Lead, Cadmium, Nickel and Phthalate free” as used herein means these substances are not intentional ingredients and are not intentionally added. Trace amounts may be present.
