Slide 16 of 24
Polyurethanes, as mentioned earlier, are deposited manually. Techniques have been developed to minimize safety issues and maximize chances of getting an acceptable part. These are only guide lines, please read MDS sheets and get someone to show you.
While handling toxic chemicals (including the polyurethanes so far used for the project), the material depositor must establish what will be contaminated by the chemicals and will therefore require gloves for handling in the future. Public lab apparatus (including, but not limited to, work bench, vacuum, scales, computers, CNC machines, palettes, floor, tools, goggles, mask, lab coat) should not be contaminated by chemicals. So be thoughtful as to what surfaces come into contact.
Use two sets of gloves (under and outer). Treat under gloves as bare skin (only an extra precaution). Handle contaminated surfaces with outer gloves. Contaminated surfaces should be limited to Chemical Storage Bottles (Nalgene) and Work Bench Cover
Proper Attire is desirable to avoid skin contact. Includes items listed above.
After using chemicals, spray container with dry gas to remove air. Moisture in air contaminates polyurethanes.