---
title: EPX 82
slug: materials/epx-82
description: Discover the benefits of EPX 82, a high-performance material ideal for automotive and consumer applications. This document covers essential considerations for working with EPX 82, including best practices for design and post-processing.
docTags:
createdAt: 2024-06-28T18:17:07.985Z
---
# Overview
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**EPX 82** combines functional toughness, stiffness, and temperature resistance making it useful in a variety of automotive, industrial, and consumer applications.
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# Resource Links
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**[About the Material
](https://www.carbon3d.com/materials/epx-82)**Material overview and uses cases
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**[Technical Data Sheet
](https://docs.carbon3d.com/files/technical-data-sheets/tds_carbon_epx-82.pdf)**Mechanical properties and data
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**[Safety Data Sheet](https://www.carbon3d.com/stewardship)**
*Login required*
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# Protocol Sheet
This downloadable handout provides important usage information, including instructions about compatible hardware, storage, resin dispensing, washing and curing. Print it out and bring it into the lab.
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**English**
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**Spanish/Español **
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**German/Deutsch**
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::File{src="https://api.archbee.com/api/presign/uXbZOKjJTGpPhjapQ8fvM-8P2aLqPw_t0iFdDVYxRWl-20250819-164847.pdf" label="EPX 82 Protocol v0605 DE.pdf"}
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**Japanese/日本語**
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::File{src="https://api.archbee.com/api/presign/uXbZOKjJTGpPhjapQ8fvM-7e2GuXAp6CEIg2nEcd8_a-20250819-165634.pdf" label="EPX 82 Protocol v0605 JP.pdf"}
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# Design Considerations
## Thin Walls
EPX 82 is a very stiff material in its fully cured state but flexible in its green state, making EPX more susceptible to the warping effects of [mass loss](docId\:U7XYytjyDp3BvsYy2qKcU). Thin walls will often print properly but are **extremely difficult to keep straight and flat **through processing and curing.
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**Mitigations**
- Follow [recommended feature sizes for EPX 82.](docId\:t94PR-A-C0pIhY6LJsWk7)
- Add structural features to support thin walls (example: gussets).
Note that [salt baking](docId:7NE6rGdaSzpAPOHH5QOzm) is also an option to mitigate warping.
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# Digital Prep Considerations
## Surfaces Parallel to Platform
With all DLS™ prints, minimizing the cross section parallel to the platform will speed printing and reduce the chances of defects. EPX 82 is susceptible to certain print defects that can be avoided with non-parallel part orientations. Window facing surfaces are especially prone to these defects due to the reduced exposure of UV light in the final slices.
Carbon recommends orienting parts at an angle and/or keeping surfaces parallel to the platform less than 10 mm across to minimize the risk of these defects:
- flow line cracks
- voids
- fence support cracks
### Defect - Flow line cracks
Flow lines occur in surfaces parallel to the platform and facing the window, appearing as X's on square areas. Flow lines occur with all resins, but in EPX 82, lines may have cracks along them.
**Troubleshooting:**
- Orient parts to keep surfaces at an angle (recommended).
- Keep surfaces parallel to the platform smaller than 10 mm across.
- Reduce solvent exposure time.
- Contact [Carbon Support ](mailto\:support@carbon3d.com)for access to the "Large cross-section/cavities" print profile. Note that use of this profile will increase print times and may result in voids in your part.
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### Defect - Voids
Voids appear as pits or craters in the part on surfaces parallel to the platform.
**Troubleshooting:**
- Orient parts to keep surfaces at an angle (recommended).
- Keep surfaces parallel to the platform smaller than 10 mm across.
- Contact [Carbon Support](mailto\:support@carbon3d.com)
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### Defect - Fence support cracks
Fence supports can be an aesthetically good option for supports and will work in the majority of cases. EPX 82, however, may crack where fence supports meet large cross sections parallel to the platform.
**Troubleshooting:**
- Use [Auto Supports.](docId\:VUbpoAitbLM11aM9-qJ1p)
- Use bar supports.
**Fence supports** can cause cracking when contacting flat surfaces parallel to platform.
**Bar supports** will not cause cracking when contacting flat surfaces parallel to platform.
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## Part Spacing
EPX 82 is a highly exothermic resin: It generates a large amount of heat during printing. The printer software will automatically slow the print to prevent overheating.
To help dissipate the heat as quickly as possible and minimize print times, Carbon recommends keeping at least 5 mm of space between parts on the platform. This enables fresh resin to flow throughout your print area, carrying away heat and preventing heat buildup.
Reference Basic Printer UI for more information on [Layout](docId\:SJ39gtBagt0cSGVVlCfli).
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**5 mm spacing**** - **Best rule of thumb for all Carbon resins.
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**2 mm spacing**** - **Tightest spacing that might be used with other resins, but EPX 82 typically generates too much heat to pack the build this tightly.
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# Printing
## Release Film
EPX 82 has a very good platform adhesion. Because of this, we highly recommend using [release film](docId\:YRnQPLrG4yMFcK1m5tCCv).
- Release film will help prevent damage to parts during removal from the platform.
- Printing on a bed of supports may mitigate the need for release film.
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When using release film, select the **Print with release film** checkbox from the Print controls sidebar.
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# Washing
## Wash Promptly
Carbon recommends washing EPX parts as soon as possible after printing, ideally within **4 hours**. And always within the pot life, counting from time of dispense.
- A component of EPX is volatile and evaporates quickly.
- Delaying washing leads to more evaporation which increases resin viscosity and makes washing more difficult.
- While queuing up parts for washing, avoid letting consumables (towels, foil, etc.) touch parts before they are washed. Liquid EPX 82 is very sticky. All will stick to the liquid resin and be difficult to remove. Even non-stick foil will stick to the liquid resin, as seen in this photo.
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**Delayed cleaning**
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**Cleaned promptly**
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## Touch Up
Swabbing may be necessary for touch up of uncleaned resin in some cases:
- For complex geometries with blind holes or similar features.
- For manually washed parts (not using the part washer).
- For parts cleaned long after printing or close to the resin's pot life.
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**Identification**
- For parts straight out of DPM solvent, **uncleaned resin will have a blue-gray tint**. (liquid resin soaked with solvent)
- After DPM solvent has evaporated, **uncleaned areas will appear black and shiny**.
**Touch up**
- Follow standard swabbing methods with IPA for lightly soiled areas.
- If parts are not coming clean with IPA swabbing alone, swab first with DPM (in the same manner) and then finish with a wipe of IPA.
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# Curing
EPX 82 is thermally cured over 12.5 hours in a multi-step process of gradually increasing the temperature. Temperatures start at 70° C and increase to 220° C.
Consult the [Resin Programs for the Yamato Oven handout](docId\:fZE0_QDaHOVHnVVM6l6kk) for detailed information.
## Notes
- Salt pack parts to minimize warping and pack between 30-150 minutes after washing.
- Ensure parts are fully cleaned, spot cleaning with swabs as needed. Check blind holes, corners and engravings.
- Minimize time between washing and salt packing for the best reduction of warpage.
- Longer times between washing and salt packing will enable easier removal of salt later. There is a tradeoff between warping potential and ease of salt removal. Plan for consistency in processing production runs.
- Salt removal requires soaking in warm, soapy water for up to 10 minutes and use agitation (such as a toothbrush) to aid in salt removal.
- Compatible baking elements: (include for all two-part resins per protocol)
- Ceramic baking tray (clean)
- Non-stick aluminum foil
- Pan mesh (may leave marks on heavy parts)
## Cleaning Salt Packed Parts
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Salt tends to stick to EPX even when parts are washed well, so salt packed parts will require extra attention in removing salt.
Compared to manual washing, salt is more easily removed from EPX 82 parts washed in a DPM filled Smart Part Washer.
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### Rest Parts Before Curing
Let parts rest for **30 – 150 minutes** between washing and salt packing.
Note: This may increase green state warpage.
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### Soak Parts After Curing
Soak parts in warm, soapy (dish soap) water for **up to 10 minutes** to facilitate removal.
**Do not soak parts longer** as EPX absorbs water and will dry very slowly.
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### Use Water and a Toothbrush
Use water and a toothbrush or other soft tool to remove salt from the part surface.
- Other dental tools, such as a water pick, can help reach areas that are difficult to access.
Pay particular attention to small spaces, bosses, corners, and engraved/embossed features.
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### Dry Parts
Compressed air can quickly dry parts.
The force of the air will also blow off any salty water that could leave a salty film on parts.
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