--- title: UMA 90 slug: materials/uma-90 description: Discover this guide for using Carbon's UMA 90 resin with the DLS platform. UMA 90 is a one-part resin perfect for prototyping and general purpose parts. It comes in an array of colors: Mix then to customize your look! docTags: createdAt: 2024-06-28T22:20:53.624Z --- # Overview ::::VerticalSplit{layout="middle"} :::VerticalSplitItem **UMA 90 **(Urethane Methacrylate) is a rigid 1-part resin similar to conventional SLA resins. It is a good fit for - Manufacturing jigs & fixtures - General purpose prototypes ::: :::VerticalSplitItem ![UMA 90 Bracket](https://res.cloudinary.com/carbon3d/image/upload/t_auto_quality_format/Education/Materials/rigid/UMA-90/uma90-gray-bracket_transparent.png) ::: :::: ## Notes - Available in black, white, gray, magenta, yellow, and cyan. - Colors can be mixed. - Wash colors in dedicated solvent & washtubs to prevent discoloration from darker resins. ## Resource Links ::::LinkArray{contentSource="CUSTOM"} :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/uXbZOKjJTGpPhjapQ8fvM-xNW60Acbs7Okn-DFgj_gP-20241126-190310.jpg"} [About the Material ](https://www.carbon3d.com/materials/uma-90)Material overview and uses cases ::: :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/meEa1m4VN4HOvIJpjIIld-20251016-220433.jpg"} [Technical Data Sheet ](https://docs.carbon3d.com/files/technical-data-sheets/tds_carbon_uma-90.pdf)Mechanical properties and data ::: :::LinkArrayItem{headerType="IMAGE" headerImage="https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/1r3fpdvMUMFVZGfey2Tjn-20251016-221405.jpg"} [Safety Data Sheet](https://www.carbon3d.com/stewardship) *Login required* ::: :::: # 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. ::::VerticalSplit{layout="left"} :::VerticalSplitItem **English** ::: :::VerticalSplitItem ::File{src="https://api.archbee.com/api/presign/3CesIL2dYMCHPZvRjp8S0/p5fzc6k_ZnO771uaIkMV2-20260512-015410.pdf" label="UMA 90 Protocol v0402.pdf"} ::: :::: ::::VerticalSplit{layout="left"} :::VerticalSplitItem **Spanish/Español ** ::: :::VerticalSplitItem ::File{src="https://api.archbee.com/api/presign/uXbZOKjJTGpPhjapQ8fvM-IhsT7E5arDD0luLMs54H7-20250130-015053.pdf" label="UMA 90 Protocol v03.04 REL_ES.pdf"} ::: :::: ::::VerticalSplit{layout="left"} :::VerticalSplitItem **German/Deutsch** ::: :::VerticalSplitItem ::File{src="https://api.archbee.com/api/presign/uXbZOKjJTGpPhjapQ8fvM-gs_bPp9SLoC2bEvSDePth-20250130-015108.pdf" label="UMA 90 Protocol v03.04 REL_DE.pdf"} ::: :::: ::::VerticalSplit{layout="left"} :::VerticalSplitItem **Japanese/日本語** ::: :::VerticalSplitItem ::File{src="https://api.archbee.com/api/presign/uXbZOKjJTGpPhjapQ8fvM-sdLmS8kIH1G6kk9XqBIOp-20250130-015147.pdf" label="UMA 90 Protocol v02.07_JP_Yasu.pdf"} ::: :::: # Resin Dispensing ## Color Mixing UMA 90 comes in an assortment of colors (black, white, gray, cyan, magenta, and yellow). When printing any color in UMA 90 you will select the **UMA 90 CMYKWG** from the drop down menu. UMA 90 colors can be mixed to create unique colors, or swirl patterns. The **COLOR MIXING** tool provides color recipes to achieve desired colors. ::embed[]{url="https://vimeo.com/527516347/4a9c3d821c?dnt=1"} 1. Click **COLOR MIXING** on the sidebar of the printer dashboard page. 2. Scroll to view the color options. 3. Click the color block desired. 4. Enter the total amount of resin to be mixed (defaults to 1 Kg). 5. Amount of resin by weight is listed per CMYK color. Additional Information - Digital CMYK color mixes **do not** translate to the pigments in UMA 90. - Color recipes are provided by weight. 1.1 g of UMA 90 = 1 mL - Extra resin can be stored in a color mixing bottle. See [Accessories & Supplies](docId:95TwE3ttL-5ihI6dNl4XI). - The color mixing tool does not allow user entered CMYK numbers. - If a custom color is needed, contact [Carbon Support](mailto\:support@carbon3d.com). # Washing ## Color Protection ::::VerticalSplit{layout="middle"} :::VerticalSplitItem UMA 90's colors are best preserved by washing light and similar colors in dedicated solvent to avoid discoloration. All resins absorb solvent during washing, which evaporates after cleaning. When using previously used solvent, the pigments from other colors also absorb into the part but do not evaporate. The following is recommended: - Dedicated solvent and washtub for light and similar colors. ::: :::VerticalSplitItem ![Example of white part washed in solvent used for a black part. ](https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/uZFtkq__twzhF8zUvRXrI_mpu100-color-protection-dsc5528.jpg) ::: :::: ## Scratches UMA 90 is susceptible to scratches in both its green state and post UV cure state. Exercise extra care in handling cosmetic surfaces. - To mitigate scratches, washing parts on the platform is recommended. - Parts washed loose in a washtub will scratch each other. - When washing parts off platform is preferred, wash parts individually to avoid scratching. ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Washing parts on the platform or individually will prevent scratches. ::: :::VerticalSplitItem ::Image[]{src="https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/qBjTQ78dWSgCmCdNCC_By_scratches-00.jpg" size="50" width="1000" height="1000" position="flex-start" darkWidth="1000" darkHeight="1000" showCaption="false"} ::: :::: ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Minor scratches can be removed with light finishing. ::: :::VerticalSplitItem ::Image[]{src="https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/7aWZ6LcKf9FawE3Kc8bdb_scratches-01.jpg" size="50" width="1000" height="1000" position="flex-start" darkWidth="1000" darkHeight="1000" showCaption="false"} ::: :::: ::::VerticalSplit{layout="middle"} :::VerticalSplitItem After curing, pack parts individually to avoid scratches. ::: :::VerticalSplitItem ::Image[]{src="https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/o3lyOzEQvkWbxjaJuViWX_scratches-02.jpg" size="50" width="1000" height="1000" position="flex-start" darkWidth="1000" darkHeight="1000" showCaption="false"} ::: :::: ## Tackiness UMA 90 is especially prone to tackiness after washing and curing. ::::VerticalSplit{layout="middle"} :::VerticalSplitItem ### Manual Washing - The second wash for UMA 90 should use **fresh IPA **solvent. - In batch washing, the same second wash solvent can be used for multiple prints so long as it maintains crystal clarity. - The second wash standard recommendation is 5 minutes. This time can be extended up to maximum solvent exposure time to mitigate tackiness. - If tackiness remains after curing, repeat the second wash in **fresh IPA** for an additional 5 minutes (or up to the maximum solvent exposure time). Dry parts and repeat UV curing. Repeat wash / cure until tackiness is gone. ::: :::VerticalSplitItem ![](https://api.archbee.com/api/optimize/3CesIL2dYMCHPZvRjp8S0/5IhtPWOgP72_8SljIXPdz_uma-tackiness-1000x.png) ::: :::: ### Smart Part Washer - UMA 90 parts can be run through the part washer up to 2 times before curing to mitigate tackiness. - When washing UMA 90 with DPM, post-IPA dunk, allow UMA 90 parts to sit for **2-3 hours** before UV curing to prevent tackiness. - If tackiness remains after curing, follow manual washing methods above.