Next Challenge: How can we personalize a shared work environment?
Formulate a Liquid that Loses its Color After Application
math & sciences chemistry materials science chemical engineering
top 10
56 months ago
Small pic spray

We are in the process of developing a new chemical for the home. In order to make the chemical easy to use, we'd like to create a water-based formula which is colorful when wet (applied), but dries quickly and fades to colorless. This will help consumers know where the product has been applied.


Propose an ingredient we can use for this application. Submit:

1) The ingredient name/compound

2) Supplemental research or information to prove it fits the requirements (becomes colorless when dry)


The formulation has to be buffered at an acidic pH, between 4 and 5, for active ingredient stability. Any colorants used must have long term (2 year +) stability in solution.

Additional requirements: Low toxicity of the colorant and low to no odor.

    Submissions will be graded on the following criteria:
  • Meets Deliverables
  • Creativity
  • Clarity
Top 5 share $750 Next 5 share $250
$150.00 O University of California at Berkeley
$150.00 N Purdue University
$150.00 D Carnegie Mellon University
$150.00 M University of Wisconsin
$150.00 Square pic 60 suyash pravin dhoot Indian Institute of Technology, Bombay
$50.00 Square pic 60 screen shot 2015 02 28 at 6.04.45 pm Boston University
$50.00 T University of New Orleans
$50.00 S Queen's University
$50.00 Square pic 60 1233256 609851865704342 1523520549 o University of South Florida
$50.00 B University of Pennsylvania
Submission questions
Drag and drop photos or image files into your solution 0 characters Average: 1713 characters
    Your solution must be at least 0 characters long
    Contact Us