--- title: Excess Resin slug: troubleshooting/excess-resin description: Discover effective solutions for addressing the "Excess Resin" part defect from Carbon DLS printing. This comprehensive document explains how to identify, troubleshoot, and understand the root causes. docTags: createdAt: 2024-06-14T01:03:27.141Z --- ::::VerticalSplit{layout="left"} :::VerticalSplitItem **Excess Resin** Shiny patches on parts or clogged gaps. ::: :::VerticalSplitItem ::Image[]{src="https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/KAXr-RS7H8NSOQinL-8fn_image.png" size="70" width="1080" height="1080" position="center" alt="Excess Resin" showCaption="false"} ::: :::: # How to Identify Excess Resin can be diagnosed as follows: - Shiny or glossy patches - Inconsistent surface sheen - Clogged gaps in a lattice :::hint{type="info"} This defect is related to the [Salt Baked Into Part](docId\:rBf4ep_02B6ocTr9YPpBz) defect, which stems from the same issue but manifests differently. ::: ::::LinkArray :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/dptYqcTHPbVZhe3zuNg4v-BWHx0vqmwiui8Kg0zbaZk-20250102-003844.png"} **Cause **- Inconclusive ::: :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/dptYqcTHPbVZhe3zuNg4v-CZ3XRzNErClbXc1FPp-uY-20250102-003844.png"} **Cause **- Inconclusive ::: :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/dptYqcTHPbVZhe3zuNg4v-Y_wr5cC3Pq5ZDeuN4TIe0-20250102-003845.png"} **Cause **- Inconclusive ::: :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/dptYqcTHPbVZhe3zuNg4v-PCTlyFIU4hgzgckUIByQ9-20250102-003845.png"} **Cause **- Inconclusive ::: :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/dptYqcTHPbVZhe3zuNg4v-GkBXUgOxbqvl94DmvPLAS-20250102-003845.png"} **Cause **- Inconclusive ::: :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/dptYqcTHPbVZhe3zuNg4v-Gs25fKIkqLEVpIuLf45pQ-20250102-003845.png"} **Cause **- Inconclusive ::: :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/dptYqcTHPbVZhe3zuNg4v-w778goyYgy6a8CYvbG8As-20250102-003845.png"} **Cause **- Inconclusive ::: :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/dptYqcTHPbVZhe3zuNg4v-KuqpHqYja7IKU20rViIks-20250102-003845.png"} **Cause **- Inconclusive ::: :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/dptYqcTHPbVZhe3zuNg4v-brD6I52K7qOPNEWAOY_nk-20250102-003845.png"} **Cause **- Inconclusive ::: :::: # Troubleshooting :::hint{type="info"} It is recommended that you review all the possible solutions before taking action to ensure you are pursuing the best course of action. ::: If the best course of action is not apparent, try the troubleshooting options in the order listed. Refer [here](docId\:pPm8gmeGCY_0fkFwgTCyj) for more tips. ## Process, Material, and Hardware Checks If any of these conditions apply to your print, take the corrective action and reprint to see if the problem is resolved. :::ExpandableHeading ### Washing - Touchup Touch up parts with additional cleaning to remove resin (shiny areas) - Use lint-free wipes - Use swabs - Use compressed air cabinet ![Touch-up Methods](https://res.cloudinary.com/carbon3d/image/upload/Education/Process/Orientation-Supports/Cost-Post-processing/Touch-Up-Gif_v0501-downsize-only_300px-12x.gif) Reference [Washing](docId\:AvN2rNsLSHhmUz9rbYkmN) for more information. ::: ::::ExpandableHeading ### Washing - Solventless Spinning - Adjust spin settings *Adjustments are listed in the recommended order to try.* - Increase spin speed +20% Note there is a risk parts will peel off the platform or tear without adequate adhesion and lattice strength at higher spin speeds. - Increase spin duration +33% :::hint{type="info"} Note that solventless spinning is a production process for select L1-printed applications. ::: :::: ## Print Preparation or Part Design Adjustments The following solutions will address print or part-related causes of the defects. Choose among the suggested actions below and select the best approach for your application. Usually only one type of adjustment is needed. :::ExpandableHeading ### Design - Redesign part: - Add a fillet or chamfer to tight corners tight corners ≤ 90°. - Provide drainage for blind holes and difficult to access features. - Increase spacing between fine features ![Redesign](https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/J2VeR9M9tPKS9A-b8FtSz_image.png) ::: :::hint{type="info"} If problems persist, please reach out to [Carbon Support](mailto\:support@carbon3d.com). ::: # Explanation & Causes ## Explanation When parts are not fully cleaned, liquid resin remains on the part after washing and cures into the part. - Features prone to collecting liquid resin and not getting fully cleaned: - Blind holesSmall openings with only one access point - Tight corners (acute angles ≤ 90°) - Tightly packed features - Difficult to access spaces *Areas that solvent cannot access easily* - Small features and openings *Such as in a lattice* **Blind Hole Example** This example shows a blind hole **without drainage** and **with a drain hole**. The blind hole with a drain hole at the base of the feature allows resin to wash out of the feature with solvent. With a swab, you can see that the blind hole retains liquid resin after washing while the drained hole comes out clean. ![Blind Hole Example](https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/Nl21iIlLybwCYobB54QK5_dkk9o0u9b5zupxqb-ull8aentfek05ejj.gif) ## Causes ### Post-Processing ::::VerticalSplit{layout="middle"} :::VerticalSplitItem How the part is **handled** in post-processing is causing the defect. ::: :::VerticalSplitItem ![Post-Processing](https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/L8qIt6vOxrll63alqGpyY_image.png) ::: :::: | Root Issue | Problem | Why Defect Presents | | ---------- | --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Washing | Blind Holes | Solvent cannot effectively reach part features when the surface tension of the liquid resin is stronger than the solvent's ability to flow through the feature. | | | Corners | | | | Tight Corners ≤ 90° | | | | Tightly Packed Features | | | | Difficult to Access Spaces | | | | Small Features and Openings | | ### Print Preparation or Part Design ::::VerticalSplit{layout="middle"} :::VerticalSplitItem How the part is **oriented**, **supported**, or **designed **is causing the defect. ::: :::VerticalSplitItem ![](https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/LhaBjVT_Yxhp03FPtHLyF_orient-and-support-quick-view-v0101-xxs.gif) ::: :::: | Root Issue | Problem | Why Defect Presents | | ---------- | --------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- | | Design | Blind Holes | Tight spaces create areas where the surface tension of the liquid resin is stronger than the solvent's ability to flow through during washing. | | | Tight Corners ≤ 90° | | | | Tightly Packed Features | | | | Difficult to Access Spaces | | | | Small Features and Openings | | | | Small Features and Openings | |