It is important to mix materials in your build trays that have suspended components to homogeneity before building with them. Some suspended particles will settle out and will block the light and can cause the build from sticking to the build platform. Use these cards to gently mix your materials in the build trays each day.
These cards are also important to remove the cured rectangle that you should be doing after the completion of all builds to assure that no particles remain stuck in your build tray that will cause an "approach fail error" because the platform can not reach the intended target height. Never use the corner of the card. It is best to use the short flat end of the card to get under the corner of the cured rectangle that you cure using the Control/LED cleaning function of your Asiga 3D Printer.