Salt Baked Into Part

salt baked into part salt remains stuck on parts after they have been rinsed with water post cure how to identify salt baked into parts can be diagnosed as follows before curing shiny spots on the part (reference excess resin defect) after curing salt that does not wash or brush off in water salt that is discolored, typically a yellow hue this defect is related to the excess resin docid\ yrpf8m5stjm3dfce wwkx defect, which stems from the same issue but manifests differently cause inconclusive cause inconclusive cause inconclusive cause inconclusive cause inconclusive troubleshooting 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 part defects 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 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 reference washing for more information 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 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 design if problems persist, please reach out to carbon support explanation & causes explanation when parts are not fully cleaned, liquid resin remains on the part after washing when the part is packed in salt for baking (a method of supporting parts during thermal curing , the liquid resin is absorbed into the salt and cures with the part features prone to collecting liquid resin and not getting fully cleaned blind holes small 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 note only select resins are compatible with salt packing reference materials overview for more information blind hole example this example shows a blind hole without drainage without drainage and with a drain hole 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 causes post processing how the part is handled in post processing is causing the defect post processing 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 washing tight corners ≤ 90° 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 washing tightly packed features 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 washing difficult to access spaces 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 washing small features and openings 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 print plan adjustments print plan adjustments print plan adjustments adjust the print plan to optimize mid to high volume production and/or address part defects in doing so, adjustment may both prevent or cause defects below are adjustments that can cause this defect 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 design tight corners ≤ 90° tight spaces create areas where the surface tension of the liquid resin is stronger than the solvent's ability to flow through during washing design tightly packed features tight spaces create areas where the surface tension of the liquid resin is stronger than the solvent's ability to flow through during washing design difficult to access spaces tight spaces create areas where the surface tension of the liquid resin is stronger than the solvent's ability to flow through during washing design small features and openings tight spaces create areas where the surface tension of the liquid resin is stronger than the solvent's ability to flow through during washing