What should I do if my whole mask starts to dissolve/delaminate/distort before I can washout my image for sandcarving? This has several possible causes: underexposure or over-washing are most likely. Underexposure can be corrected by following the exposure schedule listed in your instruction guide. The underlying cause of over-washing is usually a lack of density in the artwork. This allows UV light to partially expose areas of film that should not be exposed. This increases washout time. Increasing artwork density improves results.
If the whole mask starts to dissolve, delaminate, or distort before you can washout the mage, this is probably caused by lack of density in the artwork. A second possibility is that the mask has been exposed to UV light prior to use. This cannot be corrected.
—Darin Jones, IKONICS Imaging