为健康动物做明显标记的染料或颜料，通常有以下2种限制：
1. 染料往往是活性的，因此不容易褪色，并有强烈的产品活性成分。
2. 颜料活性低，不粘附皮肤，所以容易被清洗。
目标要求是研发一种能在动物体上染色的环保材料（如：染料，颜料或其他） 或者一种配方能够达到相同效果。
投标截止时期2016年5月29日,
投标网址https://www.innocentive.com/ar/challenge/9933850
原文
Challenge Overview
The Seeker to this Challenge has a cleaning product for animal hygiene to which the Seeker intends to add the capability to stain skin with a clear, visible mark. Various dyes and pigments exist with the potential to provide this feature, however two limitations have been found:
• Dyes tend to be reactive, hence not staining and consuming the active ingredient of the product.
• Pigments are less reactive, do not adhere to skin, and are therefore easily washed out.
The Challenge is to develop a highly colored version of the cleaning product adding to it the ability to stain animal skin. Hence, the Seeker is looking for ideas for ingredients (dyes, pigments, or others) and/or formulations that can overcome the above identified limitations and achieve this effect.
This is a Theoretical Challenge that requires only a written proposal to be submitted. The Challenge award will be contingent upon theoretical evaluation of the proposal by the Seeker.
Submissions to this Challenge must be received by 11:59 PM (US Eastern Time) on May 29, 2016. Late submissions may not be considered.
To receive an award, the Solvers will have to transfer to the Seeker their exclusive Intellectual Property (IP) rightsto the solution.
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